Updated on 2024/11/07

写真a

 
ATARASHI Hironori
 
Organization
Faculty of Environmental, Life, Natural Science and Technology Assistant Professor
Position
Assistant Professor
External link

Degree

  • Doctor(Engineering) ( 2011.3   Kyushu University )

Research Interests

  • バイオマス

  • 高性能高分子

Research Areas

  • Environmental Science/Agriculture Science / Environmental materials and recycle technology  / バイオマス

  • Nanotechnology/Materials / Polymer materials  / 高性能高分子

  • Nanotechnology/Materials / Polymer chemistry

Education

  • Kyushu University   工学府   材料物性工学専攻

    2008.4 - 2011.3

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    Country： Japan

    Notes： 博士課程

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  • Kyushu University   工学府   材料物性工学専攻

    2006.4 - 2008.3

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    Country： Japan

    Notes： 修士課程

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  • Kyushu University   工学部   物質科学工学科

    2002.4 - 2006.3

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    Country： Japan

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Research History

  • Okayama University   学術研究院環境生命自然科学学域   Assistant Professor

    2021.4

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  • Okayama University   The Graduate School of Environmental and Life Science   Assistant Professor

    2016.3

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    Country：Japan

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  • Wakayama University   Faculty of Systems Engineering   Assistant Professor

    2013.12 - 2016.2

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    Country：Japan

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  • Tokyo Institute of Technology   IYODA Supra-integrated Material   Project Assistant Professor

    2013.4 - 2013.11

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    Country：Japan

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  • Tokyo Institute of Technology   IYODA Supra-integrated Material   Postdoctral fellow

    2011.6 - 2013.3

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    Country：Japan

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  • Kyushu University   Faculty of Engineering   Postdoctoral fellow

    2011.4 - 2011.6

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    Country：Japan

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  • Japan Society for the Promotion of Science

    2009.4 - 2011.3

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    Country：Japan

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Professional Memberships

Committee Memberships

  • 高分子学会中国四国支部   若手研究会運営委員  

    2020.11   

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Papers

  • Effect of the blend ratio of cyclic and linear polyethylene blends on isothermal crystallization in the quiescent state

    Keiko Kobayashi, Hironori Atarashi, Shinichi Yamazaki, Kunio Kimura

    Polymer Journal   2023.8

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    Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    Abstract

    The role of entanglements that form between cyclic and linear polymers in crystallization is of particular interest, but it is not fully understood. We investigated the crystallization behaviors of blends of cyclic polyethylene (C-PE) and linear polyethylene (L-PE) in a quiescent state to elucidate the role of this novel entanglement in crystallization. The samples were prepared by mixing the prepared C-PE and L-PE specimens at L-PE weight fraction (ΦL-PE) values of 0–100 wt%, with the weight average molecular weights of C-PE and L-PE being 175 × 103 and 154 × 103, respectively. The isothermal crystallization behaviors were analyzed through polarizing optical microscopy (POM) and differential scanning calorimetry (DSC). The morphology observed through POM was similar to that of ΦL-PE. From the time evolution of the heat flow measured via DSC, we obtained the half-crystallization time (t1/2) values as functions of ΦL-PE at different degrees of supercooling (ΔT). The 1/t1/2 values of the C-PE and L-PE homopolymers were approximately the same at ΔT = 25.5 and 26.5 K. At a larger ΔT value, the 1/t1/2 value of C-PE was significantly larger than that of L-PE. In contrast, 1/t1/2 reached a minimum value at ΦL-PE = 30–40 wt%, irrespective of ΔT. As the entanglement density increased with increasing ΦL-PE, the crystallization rate was expected to decrease monotonically. By considering the experimental relationship between 1/t1/2 and ΦL-PE, we speculated that the suppression of crystallization in the blended system was caused by a novel entanglement formed by the penetration of the L-PE chain into the C-PE chain.

    DOI： 10.1038/s41428-023-00833-1

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    Other Link： https://www.nature.com/articles/s41428-023-00833-1

  • Influence of Preparation Conditions on Porosity of Aromatic Polyamide Hollow Spheres

    Hirofumi Nakayama, Naoto Kibayashi, Hironori Atarashi, Shinichi Yamazaki, Kunio Kimura

    Journal of Fiber Science and Technology   79 ( 8 )   185 - 191   2023.8

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    Publishing type：Research paper (scientific journal)   Publisher：Society of Fiber Science and Technology Japan  

    DOI： 10.2115/fiberst.2023-0017

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  • Morphology and growth rate of spherulite of cyclic poly(epsilon-caprolactone) having a triazole group at the closing point

    Atsushi Shinya, Ryogo Ono, Hironori Atarashi, Shinichi Yamazaki, Kunio Kimura

    POLYMER   202   2020.8

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：ELSEVIER SCI LTD  

    To clarify the effect of triazole (TR) group at the closing point within the cyclic polymer chain on the crystal growth, we studied morphology and the growth rate of spherulite G of cyclic poly(e-caprolactone) with a TR group at the closing point (C-TR-PCL) as a function of the degree of supercooling Delta T using polarizing optical microscopy. We prepared C-TR-PCLs synthesized by the ring-closing reaction from their linear precursors with M-w = 30000 and 50000, and cyclic PCL polymerized by ring expansion reaction (C-PCL) having no TR group with M-w = 26000, and linear PCL with/without a TR group at a chain end (L-TR-PCL-OH and L-PCL) with M-w = 26000 and 36000, where M-w was determined by GPC using linear polystyrene standards.We found that C-TR-PCL and L-TR-PCL-OH show banded spherulites at small Delta T and band-less normal spherulites with maltese cross at large Delta T. Whereas, C-PCL and L-PCL only showed band-less normal spherulites at any Delta T. This speculates that steric hindrance of TR group near the surface of crystals will become significant at small Delta T. G obeyed the equation, G = G(0)exp(-B/T Delta T), for all the samples. B of C-PCL and L-PCL is constant irrespective of T Delta T, however, that of C-TR-PCL and L-TR-PCL-OH showed two values depending on T Delta T. At the region of lower B, i.e., small Delta T, the banded spherulites could be observed. The change of B corresponds to the morphological change of the spherulites. Since the size of the crystalline region closely related to lamellar thickness becomes large at small Delta T, TR groups excluded from the crystals become to assemble near the surface of the crystals. This is the reason why B becomes low at small Delta T. In C-TR-PCL with higher M-w and L-TR-PCL-OH, the decrease of B with decreasing Delta T becomes small compared to that of C-TR-PCL with lower M-w due to relatively small effect of TR group.

    DOI： 10.1016/j.polymer.2020.122660

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  • Molecular weight dependence of the growth rate of spherulite of cyclic poly (epsilon-caprolactone) polymerized by ring expansion reaction

    Ryogo Ono, Hironori Atarashi, Shinichi Yamazaki, Kunio Kimura

    POLYMER   194   2020.4

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：ELSEVIER SCI LTD  

    To elucidate the molecular weight (M-w) dependence of the growth rate of spherulite (G) of cyclic polymers polymerized by the ring expansion reaction, we studied the G of cyclic poly(epsilon-caprolactone) (C-PCL) growing from the melt as a function of the crystallization temperature (T-c) and degree of supercooling (Delta T) using polarizing optical microscopy. We prepared C-PCLs comprising an exclusively repeating unit, excluding other structural units with M-w = 17000, 33000, 41000, 74000 and 85000 and linear PCLs (L-PCL) with M-w = 16000, 35000 and 60000, where M-w was determined by GPC using linear polystyrene standards.G obeyed the equation, G = G(0)exp(-B/T Delta T), for all the samples. The activation energies of secondary nucleation (B) of C-PCL were almost identical except for the C-PCL with the lowest M-w. Since B is proportional to the end surface free energy of the secondary nucleus, it implies that the regularity of the folding surface of C-PCL with high M-w is independent of M-w.Compared to C-PCL and L-PCL having almost the same M-w, G of L-PCL is higher than that of C-PCL at the same T Delta T. This suggests that G of C-PCL and L-PCL is not solely controlled by the entanglement because the entanglement of C-PCL is lower than that of L-PCL. We found the following associations: G(0)alpha M-w(-1.2) for C-PCL and G(0)alpha M-w(-0.67) for L-PCL. The difference in the power of the G(0) dependence on M-w reflects the difficulty of performing sliding diffusion in the secondary nucleus. This strongly supports the hypothesis that the absorption behavior of C-PCL chains in the secondary nucleus on the growth front is significantly different from that of L-PCL.

    DOI： 10.1016/j.polymer.2020.122403

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  • Microspheres with dimple morphology of poly(p-oxyferuloyl) prepared by reaction-induced phase separation

    Hironori Atarashi, Masahaya Sugimoto, Shinichi Yamazaki, Kunio Kimura

    Fiber Society 2018 Spring Conference: Fibers and Textiles for Value Creation in Connected Industries   2018

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    Publishing type：Research paper (international conference proceedings)  

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  • High-space resolution imaging plate analysis of extreme ultraviolet (EUV) light from tin laser-produced plasmas International journal

    Christopher S. A. Musgrave, Takehiro Murakami, Teruyuki Ugomori, Kensuke Yoshida, Shinsuke Fujioka, Hiroaki Nishimura, Hironori Atarashi, Tomokazu Iyoda, Keiji Nagai

    REVIEW OF SCIENTIFIC INSTRUMENTS   88 ( 3 )   033506 - 033506   2017.3

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER INST PHYSICS  

    With the advent of high volume manufacturing capabilities by extreme ultraviolet lithography, constant improvements in light source design and cost-efficiency are required. Currently, light intensity and conversion efficiency (CE) measurments are obtained by charged couple devices, faraday cups etc, but also phoshpor imaging plates (IPs) (BaFBr: Eu). IPs are sensitive to light and high-energy species, which is ideal for studying extreme ultraviolet (EUV) light from laser produced plasmas (LPPs). In this work, we used IPs to observe a large angular distribution (10 degrees-90 degrees). We ablated a tin target by high-energy lasers (1064 nm Nd:YAG, 10(10) and 10(11) W/cm(2)) to generate the EUV light. The europium ions in the IP were trapped in a higher energy state from exposure to EUV light and high-energy species. The light intensity was angular dependent; therefore excitation of the IP depends on the angle, and so highly informative about the LPP. We obtained high-space resolution (345 mu m, 0.2 degrees) angular distribution and grazing spectrometer (5-20 nm grate) data simultaneously at different target to IP distances (103 mm and 200 mm). Two laser systems and IP types (BAS-TR and BAS-SR) were also compared. The cosine fitting values from the IP data were used to calculate the CE to be 1.6% (SD +/- 0.2) at 13.5 nm 2% bandwidth. Finally, a practical assessment of IPs and a damage issue are disclosed. (C) 2017 Author(s).

    DOI： 10.1063/1.4978526

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  • Size control of aromatic polyamide hollow spheres prepared by reaction-induced phase separation

    Hirofumi Nakayama, Naoto Adachi, Hironori Atarashi, Tetsuya Uchida, Shinichi Yamazaki, Kunio Kimura

    POLYMER   111   239 - 243   2017.2

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    Size control of the poly (1,4-phenylene-5-hydroxyisophthalamide) hollow spheres was examined by tuning the polymerization condition, focusing on concentration, temperature and solvent. Higher concentration lowered the diameter owing to the higher degree of super-saturation for nucleation. Temperature drop during the polymerization just before the nucleation was so effective to make the diameter smaller. Moreover, the diameter was susceptive to the solubility of oligomers in the solvent, and higher content of liquid paraffin in the aromatic solvent lowered the solubility, resulting in the decrease in the diameter. Based on these results, the combination of the temperature drop and the solvent effect was the most desirable to prepare the smallest hollow spheres, and the diameter of hollow spheres could be controlled from 4.4 to 0.7 mu m. (C) 2017 Elsevier Ltd. All rights reserved.

    DOI： 10.1016/j.polymer.2017.01.060

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  • Difference in Protein Adsorption Onto Polymer Films With or Without Thermal Annealing International journal

    Takaaki Date, Yuko Ueda, Hironori Atarashi, Toshiki Sawada, Hideyo Matsuzawa, Keiji Tanaka, Takeshi Serizawa

    JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY   14 ( 4 )   3106 - 3111   2014.4

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER SCIENTIFIC PUBLISHERS  

    Protein adsorptions onto non-annealed (NA) and thermally annealed (TA) polyetherimide films were examined by surface plasmon resonance measurements. Proteins adsorbed onto the NA films with smaller adsorption constants in comparison with the TA films. Neutron reflectivity measurements of the two films suggested that the outermost region of the NA films swelled with larger amounts of water molecules than the TA films. It is plausible that the aforementioned difference in the protein adsorption properties is derived from the difference in the interfacial aggregation structures of the two films.

    DOI： 10.1166/jnn.2014.8580

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  • Uptake of water in as-spun poly(methyl methacrylate) thin films

    Hironori Atarashi, Tomoyasu Hirai, Koichiro Hori, Masahiro Hino, Hiroshi Morita, Takeshi Serizawa, Keiji Tanaka

    RSC ADVANCES   3 ( 11 )   3516 - 3519   2013

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：ROYAL SOC CHEMISTRY  

    The extent of water sorption in a thin film of a typical glassy polymer, poly(methyl methacrylate) (PMMA), was studied by neutron reflectivity. Interestingly, the as-spun film could uptake water to 16.3 vol%, much more than the reported value of a few vol% for bulk PMMA. This can be explained in terms of the heterogeneous density distribution in the film.

    DOI： 10.1039/c3ra23066j

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  • Dynamics of Water-Induced Surface Reorganization in Poly(methyl methacrylate) Films

    Ayanobu Horinouchi, Hironori Atarashi, Yoshihisa Fujii, Keiji Tanaka

    MACROMOLECULES   45 ( 11 )   4638 - 4642   2012.6

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER CHEMICAL SOC  

    At the outermost surface, aggregation states of polymers generally tend to alter to their most stable ones in response to their surrounding environment. We here apply a time-resolved contact angle measurement to study the rate of the surface reorganization of poly(methyl methacrylate) (PMMA) in water. By doing these measurements at various temperatures, it is possible to determine the apparent activation energy of the surface dynamics based on the relation of the surface relaxation time and temperature. Also, the sum-frequency generation spectroscopy revealed that the surface reorganization involves the conformational changes in the main chain part as well as the side chains. Hence, the dynamics observed here may reflect the segmental motion at the outermost region of the PMMA film, in which water plays as a plasticizer.

    DOI： 10.1021/ma3002559

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  • Density Distributions of Poly (methyl methacrylate) Thin Films in Non-Solvents

    Hironori Atarashi, Yoshihisa Fujii, Dai Yamazaki, Masahiro Hino, Hiroshi Morita, Keiji Tanaka

    KOBUNSHI RONBUNSHU   68 ( 9 )   608 - 615   2011

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    Language：Japanese   Publisher：SOC POLYMER SCIENCE JAPAN  

    Recently, polymeric materials have been widely used in applications such as medical materials. In these applications, the surface comes into contact with a different phase. Thus, their interfaces should be studied, both their structures as well as their dynamics. The density profiles of a perdeuterated poly (methyl methacrylate) (dPMMA) film in water, hexane, methanol, ethanol, 1-propanol, and 1-butanol were examined along the direction normal to the interface by neutron reflectivity (NR). Although these liquids are typical non-solvents for dPMMA, the liquid/polymer interfaces were diffuse in comparison with the air/polymer interface probably due to the partial dissolution of polymer segments at the outermost region of the film. Interestingly, in water, an anomalous swollen layer was formed beneath the diffused interface. On the other hand, such a swollen layer was not observed for the dPMMA films in alcohols. This is simply because alcohol molecules deeply penetrated into the films. The amounts of the alcohols penetrated are related to the interaction parameter. The fractional amount of nonsolvents at the substrate interface was higher than that in the internal region of the film.

    DOI： 10.1295/koron.68.608

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  • Swelling Structure of Thin Poly(methyl methacrylate) Films in Various Alkyl Length Alcohols

    Hironori Atarashi, Hiroshi Morita, Dai Yamazaki, Masahiro Hino, Toshihiko Nagamura, Keiji Tanaka

    JOURNAL OF PHYSICAL CHEMISTRY LETTERS   1 ( 5 )   881 - 885   2010.3

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    Thin films of a typical glassy polymer in alcohol nonsolvents were structurally characterized by specular neutron reflectivity (NR) and were found to be discernibly swollen. The extent of penetration by the nonsolvent was determined by the chain length of the alcohol. Treating this situation as one of a macroscopic phase separation, the interaction chi parameters for the polymer and nonsolvents combinations were extracted. This observation leads us to investigate the factors that control the nonsolvent/polymer interface, being an unusual example of a liquid/liquid interface. The fractional amount of nonsolvents at the substrate interface was higher than that in the internal region of the film. This segregation of a component in a phase-separated domain was explained in terms of an entropic factor.

    DOI： 10.1021/jz100041h

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  • Affinity of Polystyrene Films to Hydrogen-Passivated Silicon and Its Relevance to the T-g of the Films

    Yoshihisa Fujii, Zhaohui Yang, Jessica Leach, Hironori Atarashi, Keiji Tanaka, Ophelia K. C. Tsui

    MACROMOLECULES   42 ( 19 )   7418 - 7422   2009.10

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER CHEMICAL SOC  

    Qualitatively different thickness dependences have been observed in the glass transition temperature, T-g of polystyrene (PS) films supported by hydrogen-passivated silicon (H-Si). It has been suggested that upon annealing at high temperatures in air, the polymer/substrate interface of these films (i.e., PS/Si), though buried underneath the PS layer, might be oxidized, rendering the films a different polymer/ substrate interface (i.e., PS/SiOx-Si), which may account for the different thickness dependences of the T-g observed. In this experiment, we examine if the buried Substrate interface of PS/H-Si films can indeed be oxidized by annealing the films at 150 degrees C in air. Our result shows that a residual film does form on top of the H-Si surface, but it is a bound layer of PS. X-ray photoelectron spectroscopic (XPS) analyses and independence of the residual film oil the initial PS thickness evidence that the H-Si substrate buried underneath a PS film is not oxidized by annealing. We discuss a possible explanation to how the different thickness dependences may be observed in the T-g of these films.

    DOI： 10.1021/ma901851w

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  • Interfacial Width in Polymer Bilayer Films Prepared by Double-Spin-Coating and Flotation Methods International journal

    Yoshihisa Fujii, Hironori Atarashi, Masahiro Hino, Toshihiko Nagamura, Keiji Tanaka

    ACS APPLIED MATERIALS & INTERFACES   1 ( 9 )   1856 - 1859   2009.9

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER CHEMICAL SOC  

    A spin-coating method with the aid of selective solvents has been used to construct m,u. Itilayer struct ures for organic devices under the assumption that the solvents do not invade, a preformed structure. To confirm the assumption, we examined the interfacial width (lambda(i)) of model polymer bilayers, composed of polystyrene and perdeuterated poly(methyl methacrylate), prepared by spin-coating and notation methods. Neutron reflectivity measurements revealed that the lambda(i) value was,larger for the spin-coating method than for the flotation method. These results cast doubt on the validity of the assumption. This knowledge should be kept in mind when this method is applied to construct multilayer structures.

    DOI： 10.1021/am9004336

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  • Glass transition behavior of hyper-branched polystyrenes

    Kei-ichi Akabori, Hironori Atarashi, Masaaki Ozawa, Tetsuo Kondo, Toshihiko Nagamura, Keiji Tanaka

    POLYMER   50 ( 20 )   4868 - 4875   2009.9

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：ELSEVIER SCI LTD  

    Hyper-branched polystyrenes (HBPS) were synthesized. The bulk glass transition temperature (T-g) measured by differential scanning calorimetry (DSC) for two kinds of HBPS with an equivalent M-w, which were fractionated from different lots, were different, being respectively higher and lower than that of the corresponding linear polystyrene (PS). Infrared spectroscopy revealed that the T-g of HBPS increased with an increasing extent of intramolecular cross-linking, or cyclization, in the molecule. The segmental dynamics of HBPS was examined by dynamic mechanical analysis. The relaxation temperature for the segmental motion in HBPS was consistent with the DSC results. The fragility index was always lower for HBPS than for the linear PS, regardless of its primary structure and chain end chemistry. This would indicate that the segmental motion for HBPS is less cooperative than that of the linear PS, probably due to a lack of intermolecular chain entanglements in HBPS. (C) 2009 Elsevier Ltd. All rights reserved.

    DOI： 10.1016/j.polymer.2009.08.029

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  • Entanglement effect on film retention of poly(methyl methacrylate) in methanol

    Yoshihisa Fujii, Hironori Atarashi, Toshihiko Nagamura, Keiji Tanaka

    CHEMISTRY LETTERS   37 ( 3 )   326 - 327   2008.3

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：CHEMICAL SOC JAPAN  

    Morphology for films of poly(methyl methacrylate) with various molecular weights was observed before and after methanol immersion by using atomic force microscopy so that the effect of chain entanglement on film retention of a polymer in a liquid can be discussed.

    DOI： 10.1246/cl.2008.326

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  • Nonsolvents cause swelling at the interface with poly(methyl methacrylate) films International journal

    Keiji Tanaka, Yoshihisa Fujii, Hironori Atarashi, Kei-ichi Akabori, Masahiro Hino, Toshihiko Nagamura

    LANGMUIR   24 ( 1 )   296 - 301   2008.1

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER CHEMICAL SOC  

    Density profiles of a perdeuterated poly(methyl methacrylate) (dPMMA) film spin-coated on a substrate in water, hexane, and methanol, which are "nonsolvents" for dPMMA, were examined along the direction normal to the interface by specular neutron reflectivity (NR). The interfaces of dPMMA with the liquids were diffuse in comparison with the pristine interface with air; the interfacial width with water was thicker than that with hexane. Interestingly, in water, the dPMMA film was composed of a swollen layer and the interior region, which also contained water, in addition to the diffused layer. The interface of dPMMA with hexane was sharper than that with water. Although there were slight indications of a swollen layer for the dPMMA in hexane, the solvent molecules did not penetrate significantly into the film. On the other hand, in methanol, the whole region of the dPMMA film was strikingly swollen. To conserve mass, the swelling of the film by the nonsolvents is accompanied by an increase in the film thickness. The change in the film thickness estimated by NR was in excellent accord with the results of direct observations using atomic force microscopy (AFM). The modulus of dPMMA in the vicinity of the interfaces with liquids was also examined on the basis of force-distance curves measured by AFM. The modulus decreased closer to the outermost region of the film. The extent to which the modulus decreased in the interfacial region was consistent with the amount of liquid sorbed into the film.

    DOI： 10.1021/la702132t

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  • A novel structural analysis for a cylinder-forming block copolymer thin film using neutron reflectivity aided by transmission electron microtomography

    Ken-ichi Niihara, Ukyo Matsuwaki, Naoya Torikai, Hironori Atarashi, Keiji Tanaka, Hiroshi Jinnai

    MACROMOLECULES   40 ( 19 )   6940 - 6946   2007.9

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER CHEMICAL SOC  

    Microphase-separated structures of a poly(deuterated styrene-block-2-vinylpyridine) (dPS-b-P2VP) block copolymer in thin films were studied by neutron reflectivity (NR) and transmission electron microtomography (TEMT). The dPS-b-P2VP block copolymer shows a cylindrical morphology in the bulk state. The block copolymer was spun-coated on a Si substrate, which was extensively annealed (170 degrees C for 14 days) before the NR experiments. The annealed thin film showed a featureless NR profile, the reflectivity monotonically decreased with the increasing scattering vector along the depth direction of the thin film, qz. The portion of the dPS-b-P2VP block copolymer thin film used in the NR experiment was examined by TEMT, from which a three-dimensional (3D) morphology of the block copolymer thin film was successfully obtained. The 3D image clearly showed that the microphase-separated structure inside the thin film had a cylindrical morphology with some order along the depth, but almost no in-plane order. In order to analyze the NR profile by a conventional model fitting method, a model structure that exhibits a concentration profile is necessary as an initial "guess". In this study, two different models, i.e., (i) hexagonally packed P2VP cylinders laying parallel to the Si substrate based on the known lattice parameters, and (ii) experimentally obtained TEMT 3D structure, were proposed. The concentration profiles evaluated from these two models were used as the initial guesses in the fitting of the calculated profiles to the experimentally obtained NR profile, R-exp. It was found that the fitting based on the former model failed, while the fitting based on the latter one had an excellent fit to the Rexp, This result demonstrates that the microphase-separated structures that are NOT perfectly periodic nor oriented can still be analyzed by our new technique.

    DOI： 10.1021/ma071334c

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  • Structural analysis for a poly(methyl methacrylate) ultrathin film in water by neutron reflectivity

    Yoshihisa Fujii, Hironori Atarashi, Kei Ichi Akabori, Masahiro Hino, Keiji Tanaka, Toshihiko Nagamura

    Journal of Physics: Conference Series   83 ( 1 )   2007.6

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    Density profiles of a perdeuterated poly(methyl methacrylate) (dPMMA) film spin-coated on a substrate in water (H2O) and deuterated water (D2O) were examined along the direction normal to the interface by specular neutron reflectivity (NR). Although H2O and D2O were typical non-solvents for dPMMA, their interfaces were more diffuse than the air/dPMMA interface due to the swelling caused by the sorption of H 2O and D2O molecules. An isotopic effect on aggregation structure of the dPMMA film in water was also discussed. © 2007 IOP Publishing Ltd.

    DOI： 10.1088/1742-6596/83/1/012023

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  • Graft polymerization initiated by photosensitizer segregated at surface of polymer film upon ultraviolet irradiation

    Hironori Atarashi, Kei-ichi Akabori, Akihiro Tanaka, Masaaki Ozawa, Keiji Tanaka, Toshihiko Nagamura

    CHEMISTRY LETTERS   36 ( 6 )   808 - 809   2007.6

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：CHEMICAL SOC JAPAN  

    A novel approach to surface modification of polymer films is proposed on the basis of graft polymerization initiated from photosensitizers attached to hyperbranched polymers which are localized at the film surface.

    DOI： 10.1246/cl.2007.808

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  • Gas sorption into surface of poly(methyl methacrylate) films at atmospheric pressure

    Yoshihisa Fujii, Hironori Atarashi, Norifumi Yamada, Naoya Torikai, Toshihiko Nagamura, Keiji Tanakai Fi

    POLYMER JOURNAL   39 ( 12 )   1290 - 1294   2007

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：NATURE PUBLISHING GROUP  

    Interfacial structure of deuterated poly(methyl methacrylate) (dPMMA) and polystyrene (dPS) films with gases such as carbon dioxide (CO2) and nitrogen (N-2) under a pressure of 0.1 MPa was examined by neutron reflectivity (NR). The interface was analyzed using a model that the density of the outermost region of the films was lower than that of the interior region. The density profile was expressed by a single exponential equation with a decay length (xi). The xi values for the dPMMA films under CO2 and N-2 were larger than that under vacuum at a given temperature, and the extent was more remarkable under CO2 than under N-2. On the other hand, such a gas sorption was not clearly discerned for the dPS films. Finally, the surface relaxation in the dPMMA and dPS films under CO2 and N-2 was discussed on the basis of lateral force measurements.

    DOI： 10.1295/polymj.PJ2007070

    Web of Science

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  • Modification and function of polymer surfaces and interfaces using hyper-branched polymers

    Hironori Atarashi, Keiji Tanaka, Toshihiko Nagamura, Alain Deffieux, Michel Schappacher

    Polymer Preprints, Japan   55 ( 2 )   4288 - 4289   2006

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    Publishing type：Research paper (international conference proceedings)  

    Aggregation structure of (hyperbranched polystyrene/linear polystyrene) blend films was examined by dynamic secondary ion mass spectroscopy (DSMS) and neutron refflectivity (NR). Two types of monodisperse hyperbranched polystyrenes (HB-PS) with longer and shorter branches were synthesized combing cationic and anionic polymerizations. Total molecular mass for the both was fixed to be 1M. Deuterated polystyrene (dPS) with molecular weight of 1M was used as a linear component. DSMS and NR measurements revealed that HB-PS are preferentially segregated at both surface and substrate interface. Interestingly, to what extent HB-PS exists at the surface and interface was dependent on the architecture of HB-PS. This might be explained in terms of number density of chain ends and distorted chain conformation. The above results were in good accordance with a prediction based on simulation using a self-consistent filed theory. Finally, a possibility of HB-PS as a surface or interfacial modifier is discussed.

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Books

  • バイオマス材料の開発と応用

    技術情報協会, 中嶋, 元（ Role： Contributor ,  第５章５節 バイオマス原料を用いた芳香族系高分子微粒子の重合）

    技術情報協会  2023.3  （ ISBN:9784861049408 ）

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    Total pages：558p   Language：Japanese

    CiNii Books

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  • 次世代のポリマー・高分子開発，新しい用途展開と将来展望

    （ Role： Contributor ,  第9章 生分解性高分子，植物由来ポリマーの種類と構造，メカニズム，その応用 第4節 バイオ材料由来の「スーパーエンジニアリングプラスチック」の開発とその可能性）

    株式会社 エヌ・ティー・エス  2019.2 

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MISC

  • リグニン由来バイオマスを原料とする芳香族高分子の構造制御

    新 史紀

    繊維学会誌   79 ( 12 )   380 - 383   2023.12

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    Authorship：Lead author   Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

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  • Molecular Aggregation States of Poly (meth) acrylate Thin Films in Non-solvents

    MATSUNO Hisao, ATARASHI Hironori, FUJII Yoshihisa, YAMAZAKI Dai, HINO Masahiro, MORITA Hiroshi, HIRATA Toyoaki, TANAKA Masaru, TANAKA Keiji

    hamon   23 ( 1 )   62 - 65   2013

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    Language：Japanese   Publisher：The Japanese Society for Neutron Science  

    <p>Recently, polymeric materials have been widely used in medical applications. In these cases, the surface is supposed to contact with a different phase. Thus, the polymer interfaces contacted with different phases should be studied, structurally and dynamically. Density profiles of a perdeuterated poly (methyl methacrylate) (dPMMA) film in water, hexane, methanol, ethanol, 1-propanol, and 1-buthanol were examined along the direction normal to the interface by neutron reflectivity (NR). Although these liquids are typical non-solvents for dPMMA, the liquid/polymer interfaces were diffuse in comparison with the air/polymer interface probably due to the partial dissolution of segments at the outermost region of the film. Interestingly, in water, the anomalous swollen layer was formed beneath the diffused interface. On the other hand, such a swollen layer was not observed for the dPMMA films in alcohols. This is simply because alcohol molecules deeply penetrated into the films. The amounts of the alcohols penetrated in the films could be explained in terms of the interaction parameter. The fractional amount of non-solvents at the substrate interface was higher than that in the internal region of the film. Furthermore, aggregation structure of poly (2-methoxyethyl acrylate) film, which has been used as a coating material for biomedical apparatus due to the excellent blood compatibility, was examined in water</p>

    DOI： 10.5611/hamon.23.1_62

    CiNii Article

    CiNii Books

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  • Polymer/Liquid Interface

    Atarashi Hironori, Fujii Yoshihisa, Tanaka Keiji

    hamon   19 ( 2 )   105 - 108   2009

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    Language：Japanese   Publisher：The Japanese Society for Neutron Science  

    <p>As stated in the previous review by Kawaguchi and Matsushita, neutron reflectometry (NR) enables us to gain direct access to density or composition profile along the direction normal to the surface with an excellent depth resolution being better than 1 nm. We here show our recent results dealing with density profiles of a perdeuterated poly(methyl methacrylate) (dPMMA) film spin-coated on a substrate in water, hexane and methanol, which are typical "non-solvents" for dPMMA. The interfaces of dPMMA with the liquids were diffuse in comparison with the pristine interface with air; the interfacial width with water was thicker than that with hexane. Interestingly, in water, the dPMMA film was composed of a swollen layer and the interior region, which also contained water, in addition to the diffused layer. The interface of dPMMA with hexane was sharper than that with water. Although there were slight indications of a swollen layer for the dPMMA in hexane, the solvent molecules did not penetrate significantly into the film. On the other hand, in methanol, the whole region of the dPMMA film was strikingly swollen. The modulus of dPMMA in the vicinity of the interfaces with liquids was also examined on the basis of force-distance curves measured by atomic force microscopy (AFM). The modulus decreased closer to the outermost region of the film. The extent to which the modulus decreased in the interfacial region was consistent with the amount of liquid sorbed into the film.</p>

    DOI： 10.5611/hamon.19.2_105

    CiNii Article

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Presentations

  • 重合相変化を利用したポリ（p -オキシクマロイル-co-p-オキシフェルロイル）異形微粒子の調製

    新 史紀, 井内崇人, 山崎慎一, 木村邦生

    2024年繊維学会秋季研究発表会  2024.11.29 

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    Event date： 2024.11.28 - 2024.11.29

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • シクロオクテンのメタセシス重合とカップリング剤とのクリック反応および水素化反応を経由した分岐ポリエチレン合成の試み

    堀江里彩, 新 史紀, 山崎慎一, 木村邦生

    2024年繊維学会秋季研究発表会  2024.11.28 

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    Event date： 2024.11.28 - 2024.11.29

    Language：Japanese   Presentation type：Poster presentation  

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  • ポリメチルアクリレートをベースとした微粒子フィルムの化学構造解析

    新 史紀, 湊 遥香, 鈴木大介

    2024年日本化学会中国四国支部大会 岡山大会  2024.11.16 

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    Event date： 2024.11.16 - 2024.11.17

    Language：Japanese   Presentation type：Poster presentation  

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  • ポリ(d-バレロラクトン)のGPC-LS-Visco によるキャラクタリゼーション

    松岡眞平, 續木雄大, 新 史紀, 山崎慎一

    第39回中国四国地区高分子若手研究会  2024.11.12 

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    Event date： 2024.11.12 - 2024.11.13

    Language：Japanese   Presentation type：Poster presentation  

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  • AB2型モノマーとの共重合がポリ(p-オキシベンゾイル)微粒子の形状に与える影響

    北川朋樹, 新 史紀, 山崎慎一, 木村邦生

    第39回中国四国地区高分子若手研究会  2024.11.12 

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    Event date： 2024.11.12 - 2024.11.13

    Language：Japanese   Presentation type：Poster presentation  

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  • 重合相分離過程に光反応を組み込んで調製したポリ（ヒドロキシ桂皮酸）類微粒子

    新 史紀, 小枝 正揮, 山崎 慎一, 木村 邦生

    第73回高分子討論会  2024.9.26 

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    Event date： 2024.9.25 - 2024.9.27

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 重合結晶化法にもとづく三成分共重合系の成分分別効果に及ぼす仕込み組成比の影響

    新 史紀, 鈴木 杏, 宮脇里奈, 山崎慎一, 木村邦生

    2024年繊維学会年次大会 （創立 80 周年記念）  2024.6.14 

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    Event date： 2024.6.12 - 2024.6.14

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 2,5-フランジカルボン酸を必須成分とする液晶性高分子の合成

    岡村裕士, 新 史紀, 山崎慎一, 木村邦生

    2024年繊維学会秋季研究発表会  2024.11.28 

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    Event date： 2024

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  • 基板を利用した重合結晶化によるポリイミド結晶の配列制御

    兼田洸椰, 新 史紀, 山崎慎一, 木村邦生

    2023年繊維学会秋季研究発表会  2023.11.27 

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    Event date： 2023.11.27 - 2023.11.28

    Language：Japanese   Presentation type：Poster presentation  

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  • ポリ(p-ジオキサノン)のバンド球晶生成に及ぼすトポロジー効果

    木村茉由子, 大野良悟, 新史紀, 山崎慎一, 木村邦生

    2023年繊維学会秋季研究発表会  2023.11.27 

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    Event date： 2023.11.27 - 2023.11.28

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • ポリエチレン、ポリプロピレンならびにそれらのブレンドに関する光劣化挙動

    速水智菜, 新史紀, 山崎慎一, 木村邦生, 小室晴香, 貝原祐一

    2023年繊維学会秋季研究発表会  2023.11.27 

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    Event date： 2023.11.27 - 2023.11.28

    Language：Japanese   Presentation type：Poster presentation  

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  • 重合相変化法を利用したポリエステル樹脂のアップサイクルシステムの開発

    佐伯壮真, 小原達也, 石原広崇, 新史紀, 山崎慎一, 木村邦生

    2023年繊維学会秋季研究発表会  2023.11.27 

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    Event date： 2023.11.27 - 2023.11.28

    Language：Japanese   Presentation type：Poster presentation  

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  • ポリ(ヒドロキシ桂皮酸)類微粒子の形態に及ぼす置換基効果

    小枝正揮, 新史紀, 山崎慎一, 木村邦生

    第38回中国四国地区高分子若手研究会  2023.11.2 

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    Event date： 2023.11.1 - 2023.11.2

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  • 重水素化ジイミドを用いた部分重水素化環状及び直鎖状ポリエチレンの合成

    小林尚樹, 新史紀, 山崎慎一, 木村邦生

    第38回中国四国地区高分子若手研究会  2023.11.1 

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    Event date： 2023.11.1 - 2023.11.2

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  • ポリ(p-オキシフェルロイル)微粒子の形状におよぼす共重合の影響

    井内崇人, 新史紀, 山崎慎一, 木村邦生

    第38回中国四国地区高分子若手研究会  2023.11.1 

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    Event date： 2023.11.1 - 2023.11.2

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  • 重合結晶化を利用した芳香族ポリエステルの三成分系成分分別重合

    新 史紀, 宮脇里奈, 西村周平, 山崎慎一, 木村邦生

    第72回高分子討論会  2023.9.26 

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    Event date： 2023.9.26 - 2023.9.28

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 環状、星型および直鎖状ポリ(p-ジオキサノン)の球晶成長速度の分子量依存性

    木村茉由子, 大野良悟, 新史紀, 山崎慎一, 木村邦生

    2023年繊維学会年次大会  2023.6.14 

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    Event date： 2023.6.14 - 2023.6.16

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • カルド構造含有アラミドの合成と特性評価

    垣原颯斗, 新史紀, 山崎慎一, 木村邦生, 杉本雅行, 山田昌宏

    第37回中国四国地区高分子若手研究会  2022.12.2 

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    Event date： 2022.12.1 - 2022.12.2

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • バイオマスを原料とした高性能高分子の調製と 形態制御 Invited

    新 史紀

    2022年日本化学会中国四国支部大会 広島大会  2022.11.13 

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    Event date： 2022.11.12 - 2022.11.13

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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  • 環状（p-ジオキサノン）の球晶成長におけるトポロジー効果

    大野 良悟, 木村 茉由子, 新 史紀, 山崎 慎一, 木村 邦生

    2022年 繊維学会秋季研究発表会  2022.11.10 

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    Event date： 2022.11.9 - 2022.11.10

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  • ポリ（p-オキシフェルロイル）ディンプル型球状微粒子における粒子径とディンプル径の重合濃度依存性

    松田 敬裕, 新 史紀, 山崎 慎一, 木村 邦生

    2022年 繊維学会秋季研究発表会  2022.11.9 

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    Event date： 2022.11.9 - 2022.11.10

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  • 鎖の中央または片末端に繰り返し単位とは異なる置換基を有するポリ（ε-カプロラクトン）の合成と結晶化

    安東 眞矢, 新 史紀, 山崎 慎一, 木村 邦生

    第71回高分子討論会  2022.9.5 

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    Event date： 2022.9.5 - 2022.9.7

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  • 環状と直鎖状のトポロジーの違いがポリ(p-ジオキサノン)のバンド球晶生成に及ぼす影響

    木村 茉由子, 大野 良悟, 新 史紀, 山崎 慎一, 木村 邦生

    第71回高分子討論会  2022.9.5 

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    Event date： 2022.9.5 - 2022.9.7

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  • 環状と直鎖状ポリエチレンブレンドの静置下等温結晶化挙動に及ぼすブレンド比の効果

    小林 慧子, 新 史紀, 山崎 慎一, 木村 邦生

    第71回高分子討論会  2022.9.5 

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    Event date： 2022.9.5 - 2022.9.7

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  • Preparation of Bio-based Microsphere with Dimple Morphology

    Hironori Atarashi, Takahiro Matsuda, Masahaya Sugimoto, Shinichi Yamazaki, Kunio Kimura

    The 16th Asian Textile Conference  2022.7.29 

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    Event date： 2022.7.27 - 2022.7.29

    Language：English   Presentation type：Oral presentation (general)  

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  • 環状ポリエチレンと直鎖状または星型ポリエチレンのブレンド系における流動場結晶化

    岡田 大輝, 小林 慧子, 山崎 慎一, 新 史紀, 木村 邦生

    2021年繊維学会秋季研究発表会  2021.11.19 

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    Event date： 2021.11.18 - 2021.11.19

    Language：Japanese   Presentation type：Poster presentation  

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  • ディンプル型球状微粒⼦の形態制御

    新 史紀, 池田 侑季子, 松田 敬裕, 山崎 慎一, 木村 邦生

    2021年繊維学会秋季研究発表会  2021.11.18 

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    Event date： 2021.11.18 - 2021.11.19

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 重合相変化を利⽤したアラミド中空微粒⼦のサイズと空孔率制御

    中山 博文, 木林 直人, 新 史紀, 山崎 慎一, 木村 邦生

    2021年繊維学会秋季研究発表会  2021.11.18 

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    Event date： 2021.11.18 - 2021.11.19

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 重合結晶化を利⽤したポリバニリン酸針状結晶の調製

    西村 周平, 新 史紀, 山崎 慎一, 木村 邦生

    2021年繊維学会秋季研究発表会  2021.11.18 

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    Event date： 2021.11.18 - 2021.11.19

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  • ポリ(ε-カプロラクトン)及びポリ(p-ジオキサノン)でグラフト化されたセルロースナノ結晶の結晶化核剤能の評価

    馬杉 直樹, 小林 慧子, 大村 雅也, 新 史紀, 山崎 慎一, 木村 邦生

    第35回中国四国地区高分子若手研究会  2021.11.6 

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    Event date： 2021.11.5 - 2021.11.6

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  • 環状と直鎖状ポリエチレンブレンド系の引張過程における応力ひずみ挙動の変化

    栗本 将成, 新 史紀, 山崎 慎一, 木村 邦生

    第36回中国四国地区高分子若手研究会  2021.11.4 

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    Event date： 2021.11.4 - 2021.11.5

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  • 重合結晶化によるポリ(p-オキシシンナモイル)の選択的調製

    宮脇 里奈, 新 史紀, 山崎 慎一, 木村 邦生

    第36回中国四国地区高分子若手研究会  2021.11.4 

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    Event date： 2021.11.4 - 2021.11.5

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  • ポリ(p-ジオキサノン)のバンド球晶生成における結晶化温度及び分子量依存性

    木村 茉由子, 山崎 慎一, 新 史紀, 木村 邦生

    第70回高分子討論会  2021.9.7 

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    Event date： 2021.9.6 - 2021.9.8

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  • 環拡大重合による環状ポリ(p-ジオキサノン)の合成と球晶成長

    大野 良悟, 山崎 慎一, 新 史紀, 木村 邦生

    第70回高分子討論会  2021.9.6 

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    Event date： 2021.9.6 - 2021.9.8

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  • 分子量が異なるパーフルオロデシル基を有するテレケリックポリエチレンの 結晶化及び表面物性

    藤後 友輔, 新 史紀, 山崎 慎一, 木村 邦生

    第35回中国四国地区高分子若手研究会  2020.11.5 

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    Event date： 2020.11.5 - 2020.11.6

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  • 鎖の中央に構造欠陥を有するポリ(ε-カプロラクトン)の合成と結晶化

    安東 眞矢, 新 史紀, 山崎 慎一, 木村 邦生

    第35回中国四国地区高分子若手研究会  2020.11.5 

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    Event date： 2020.11.5 - 2020.11.6

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  • 側鎖にイソブチル基を有する新規ポリオレフィンの合成と結晶化

    奥泉 陶和, 新 史紀, 山崎 慎一, 木村 邦生

    第35回中国四国地区高分子若手研究会  2020.11.5 

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    Event date： 2020.11.5 - 2020.11.6

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  • AB2型モノマーであるカフェ酸を原料とした高分子合成とその一次構造解析

    新 史紀, 河田 駿也, 山崎 慎一, 木村 邦生

    2020年度繊維学会年次大会  2020.6.12 

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    Event date： 2020.6.10 - 2020.6.12

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • ポリ（アミド－イミド）ウィスカーの調製

    藤原 響美, 新 史紀, 山崎 慎一, 木村 邦生, 内田 哲也

    2020年度繊維学会年次大会  2020.6.12 

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    Event date： 2020.6.10 - 2020.6.12

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 高分子鎖の中央にトリアゾール環を有するポリ(ε-カプロラクトン)の合成と結晶化

    安東 眞矢, 新 史紀, 山崎 慎一, 木村 邦生

    第69回高分子学会年次大会  2020.5.27 

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    Event date： 2020.5.27 - 2020.5.29

    Language：Japanese   Presentation type：Poster presentation  

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  • 分子量が異なる両末端にパーフルオロアルキル基を有するテレケリックポリエチレンの結晶化挙動および表面物性

    藤後 友輔, 新 史紀, 山崎 慎一, 木村 邦生

    第69回高分子学会年次大会  2020.5.27 

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    Event date： 2020.5.27 - 2020.5.29

    Language：Japanese   Presentation type：Poster presentation  

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Industrial property rights

  • メタマテリアルの製造方法

    彌田 智一, 新 史紀, 山下 七重, 鎌田 香織, 北岡 賢治

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    Applicant：国立大学法人東京工業大学

    Application no：特願2013-176030  Date applied：2013.8.27

    Announcement no：特開2015-045708  Date announced：2015.3.12

    J-GLOBAL

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  • 表面改質されたポリマー構造体の製造方法

    小澤 雅昭, 大土井 啓祐, 新 史紀, 赤堀 敬一, 田中 敬二, 長村 利彦

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    Applicant：日産化学工業株式会社

    Application no：特願2009-511891  Date applied：2008.4.23

    Publication no：WO2008-133283  Date published：2008116

    Patent/Registration no：特許第5430396号  Date registered：2013.12.13 

    J-GLOBAL

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Awards

  • 第4回ソフトマター物理若手勉強会優秀ポスター発表賞

    2010.11  

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  • ISAMN'07 Honorable Mention Poster Award

    2007.10  

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  • 第43回化学関連支部合同九州大会 若手奨励賞

    2006.11  

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Research Projects

  • プラスチックケミカルリサイクルシステムの構築に向けた成分分別重合技術の開発

    2024.10 - 2026.03

    岡山大学  令和6年度岡山大学若手研究者研究着想支援事業 

    新 史紀

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    Authorship：Principal investigator 

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  • 結晶格子中の分子鎖形態に焦点を当てた環状高分子群による結晶化機構の解明

    Grant number：24K01556  2024.04 - 2027.03

    日本学術振興会  科学研究費助成事業  基盤研究(B)

    山崎 慎一, 新 史紀

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    Grant amount：\18330000 （ Direct expense: \14100000 、 Indirect expense：\4230000 ）

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  • 環状と直鎖状高分子のトポロジカルブレンドの延伸過程の絡み合いと結晶高次構造変化

    Grant number：21K05186  2021.04 - 2024.03

    日本学術振興会  科学研究費助成事業 基盤研究(C)  基盤研究(C)

    山崎 慎一, 木村 邦生, 新 史紀

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    Grant amount：\4290000 （ Direct expense: \3300000 、 Indirect expense：\990000 ）

    本研究の目的は、環状と直鎖状高分子の混合によって、絡み合い解消に強弱がつけられるブレンド系に、延伸を加えたときの力学的応答と結晶高次構造の変化を観察することによって、延伸過程の絡み合い変化を伴う構造形成の分子論的メカニズムを理解し、全く新しい結晶性高分子材料の創製に繋げることである。この目的を達成するために、①環状および直鎖状高分子の合成とキャラクタリゼーション②ブレンド高分子の結晶化試料の調製とその延伸過程における応力ひずみ曲線の測定③ブレンド高分子の結晶化試料の延伸過程における結晶高次構造の変化のその場観察を申請者が中心となった研究グループによって行う。
    当該年度は、分子量が193,000の環状と、分子量が93,000または145,000の直鎖状ポリエチレンのブレンド系についての研究を実施した。環状および直鎖状ポリエチレンとして、修飾型Grubbs触媒および第2世代Grubbs触媒によるシクロオクテンの環拡大重合によって調製される前駆体高分子を水素化した環状および直鎖状ポリエチレンを用いた。調製した試料の化学構造の確認を現有のNMRおよび赤外吸収分光計で行った。環状と直鎖状ポリエチレンを所定の割合でブレンドした試料を作製した。
    ブレンド試料の応力ひずみ曲線を室温において引張試験機にて測定した。応力ひずみ曲線の破断ひずみの変化に着目すると、ブレンド成分である直鎖状ポリエチレンの分子量やその組成に応じて、破断ひずみが変化することが明らかになった。

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  • 災害復旧用の大型フレキシブルコンテナーバックの吊りベルトに使用される非相溶系の樹 脂混錬物を用いた延伸糸の耐候劣化メカニズムの解明と敷設環境暴露後の引張破断 強度改善品の実用化

    2020.12 - 2023.01

    国立研究開発法人 新エネルギー・産業技術総合開発機構  官民による若手研究者発掘支援事業 共同研究フェーズ 

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    Authorship：Principal investigator 

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  • 機能性高性能高分子の一次構造制御

    2020.04 - 2021.02

    公益財団法人 岡山工学振興会  学術研究助成 産業先行研究 

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    Authorship：Principal investigator 

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  • Preparation of biobased high-performance polymer fine particles having dimple morphology

    Grant number：19K05618  2019.04 - 2022.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    Atarashi Hironori

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    Grant amount：\4420000 （ Direct expense: \3400000 、 Indirect expense：\1020000 ）

    A spherical fine particle having dimple structure on the surface were prepared using ferulic acid, which is a kind of biomass, as a starting material by reaction-induced phase separation of oligomers during solution polymerization method. Although this method is simple, just leaving a monomer in a solution at a polymerization temperature for several hours, the formation mechanism is complex. The doble bond in the ferulic acid would be a key of dimple structure, which makes crosslink in the particles phase separated from the solution. The diameter of the particle could be controlled from several micrometer to 10 micrometers by changing the polymerization conditions. Also, the size and number of dimples on the surface of the particle could be changed. This dimple particle has excellent thermal stability despite a full biobased polymer.

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  • Development of novel chemical recycling system of aromatic polymers by using equilibrium exchange reaction between polymer molecules and cyclic oligomers

    Grant number：18K19877  2018.06 - 2021.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Research (Exploratory)  Grant-in-Aid for Challenging Research (Exploratory)

    Kimura Kunio

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    Grant amount：\4290000 （ Direct expense: \3300000 、 Indirect expense：\990000 ）

    In order to establish the sustainable society, chemical recycling system of super-engineering plastics which are comprised of aromatic moieties is important. However, usual chemical recycling of plastics converting to monomers by chemical reaction contained many steps, leading to cost demerit and high energy consumption. From these circumstances, novel chemical recycling system was developed in this study, by using equilibrium exchange reaction between polymer molecules and cyclic oligomers. Bio-base aromatic polymers possessing high-performance were synthesized from biomass and cardo-type compounds extracted from tar. Although aromatic polyesters were difficult to convert cyclic oligomers so far, it was clarified that the aromatic polyamide was better for this system. Now, the optimization of conditions to convert cyclic oligomers and their ring-opening polymerization of aromatic polyamides is examined to establish the novel chemical recycling system.

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  • Crystallization control using entanglement topology that not able to be realized only by linear polymer

    Grant number：17K05998  2017.04 - 2020.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)

    Yamazaki Shinichi

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    Grant amount：\4810000 （ Direct expense: \3700000 、 Indirect expense：\1110000 ）

    In this work, we elucidated the crystallization mechanism of polymers with entanglement topology that cannot be realized by linear polymers alone. It is realized the group of entanglement topology that cannot be realized only by linear polymers by using a mixture of cyclic polymers without knot entanglement and linear or star polymers having complicated knot entanglements.
    Throughout the entire study period, we preformed the studies on blended systems of cyclic and linear or star polyethylene with different molecular weights.
    In-situ observation of the crystallization behavior of the sample under quiescent state and in the flow field was performed by means of polarizing microscopy. We clarified the effect of the entanglement of star-shaped polymer branching points and cyclic and linear chains on the crystallization of the blend system.

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  • 糖鎖が形成する多点相互作用を利用した新規接着機構の開発

    2015.04 - 2016.03

    公益財団法人 稲盛財団  稲盛財団研究助成 

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    Authorship：Principal investigator 

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  • 非溶媒と接触した高分子界面におけるナノ溶解・膨潤層の形成機構解明と応用展開

    Grant number：09J02961  2009 - 2010

    日本学術振興会  科学研究費助成事業 特別研究員奨励費  特別研究員奨励費

    新 史紀

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    Grant amount：\1400000 （ Direct expense: \1400000 ）

    高分子固体の表面および界面はバルクと異なるエネルギー状態にある。そのため、表面および界面の構造および物性はバルクと比較して著しく異なっている。これまで、測定手法の困難さなどの理由から、液体すなわち非溶媒環境下における高分子固体の構造および物性についてはほとんど検討されていない。そのため、非溶媒環境下における高分子固体中における分子鎖の凝集状態およびダイナミクスは科学的にとても興味深い。本研究では、非溶媒環境下におけるポリメタクリル酸メチル(PMMA)膜の凝集状態について検討した。
    これまでに、水環境下におけるPMMA膜の凝集状態を中性子反射率(NR)測定に基づき評価し、熱処理の影響について検討した。その結果、熱処理の有無によって水環境下での凝集状態は大きく異なった。この凝集状態は水と接触する前の膜中における分子鎖の凝集状態と密接な関係があることを明らかにした。また、メタノール環境下におけるPMMA膜の凝集状態の膜厚依存性についても評価した。その結果、膜の凝集状態は空気中での膜厚に依存することが明らかとなった。さらに、用いたPMMAの非摂動鎖の広がり程度以下の膜厚を有する超薄膜では顕著な膨潤が観測された。その凝集状態の変化から超薄膜中における分子鎖の凝集状態を明らかにした。
    得られた結果は、液体環境下における高分子固体の凝集状態やダイナミクスの理解に繋がるため、意義があるといえる。また、医療材料をはじめ液体環境下で使用される高分子材料は多いため、それらの高機能化、また新規機能性材料への重要な設計指針にもなり得る。これらのことから本研究は科学的にも工業的にも重要性が高いといえる。上述の結果は論文3報として2011年5月までに投稿する。

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Class subject in charge

  • Experiment for Chemistry and Biotechnology 1 （2024academic year） 1st and 2nd semester  - 月5～8

  • Experiment for Chemistry and Biotechnology 1 （2024academic year） 1st and 2nd semester  - 木5～8

  • Experiment for Chemistry and Biotechnology 2 （2024academic year） Fourth semester  - 月5～8

  • Synthetic Chemistry Experiment 1 （2024academic year） Fourth semester  - 月5～8

  • Basic Experiments in Chemistry （2024academic year） 1st and 2nd semester  - 月5～8

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  • Material Process Experiment 1 （2024academic year） Fourth semester  - 月5～8

  • Basic Experiments in Analytical Chemistry （2024academic year） 1st-4th semester  - [第１学期]月5～8,木5～8, [第２学期]月5～8,木5～8, [第３学期]その他, [第４学期]月5～8

  • Biotechnology experiment 1 （2024academic year） Fourth semester  - 月5～8

  • Experiment for Chemistry and Biotechnology 1 （2023academic year） 1st and 2nd semester  - 月5～8

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  • Experiment for Chemistry and Biotechnology 2 （2023academic year） Fourth semester  - 月5～8

  • Synthetic Chemistry Experiment 1 （2023academic year） Fourth semester  - 月5～8

  • Basic Experiments in Chemistry （2023academic year） 1st and 2nd semester  - 月5～8

  • Basic Experiments in Chemistry （2023academic year） 1st and 2nd semester  - 木5～8

  • Material Process Experiment 1 （2023academic year） Fourth semester  - 月5～8

  • Basic Experiments in Analytical Chemistry （2023academic year） 1st and 2nd semester  - 月5～8,木5～8

  • Biotechnology experiment 1 （2023academic year） Fourth semester  - 月5～8

  • Experiment for Chemistry and Biotechnology 1 （2022academic year） 1st and 2nd semester  - 月5～8

  • Experiment for Chemistry and Biotechnology 1 （2022academic year） 1st and 2nd semester  - 木5～8

  • Synthetic Chemistry Experiment 1 （2022academic year） Fourth semester  - 月5～8

  • Material Process Experiment 1 （2022academic year） Fourth semester  - 月5～8

  • Basic Experiments in Analytical Chemistry （2022academic year） 1st and 2nd semester  - 月5～8,木5～8

  • Experiments and Exercises in Environmental Chemistry B （2022academic year） 3rd and 4th semester  - 木5～7

  • Biotechnology experiment 1 （2022academic year） Fourth semester  - 月5～8

  • Basic Experiments in Analytical Chemistry （2021academic year） 1st and 2nd semester  - 月7～9,木7～9

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  • Physics Experiments for General Education （2020academic year） Fourth semester  - 木5,木6,木7,木8

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Social Activities

  • 岡山県立岡山操山中学校 未来航路プロジェクト

    Role(s)：Advisor

    2024.10.31

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  • 鳥取県立米子東高等学校 探究的学習

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    2024.9.19

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    2023.9.21

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    2022.9.15

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    2021.9.16

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    2020.11.25

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    2019.9.19

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    2018.9.13

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    2017.9.14

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    2016.9.14

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