投稿論文

Compressive double yielding in high-density polyethylene over a wide range of strain rates
Yusuke Hiejima, Nobuhiro Misumi, Ryohei Ippitsu, Takumitsu Kida, Masahiro Higuchi, Hiroyuki Yamada, and Koh-hei Nitta,
Polymer, 291, 126590 (2024)
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In-situ Raman spectroscopic study of conformational reorganization during heat treatment for high-density polyethylene solid
Misato Nabata, Takumitsu Kida, Yusuke Hiejima, and Koh-hei Nitta,
Polymer, 290, 126558 (2024)
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直鎖アルコールおよび直鎖アルカンの高密度ポリエチレンへの添加効果
伊藤麻絵，松平希咲，河野公一，比江嶋祐介，新田晃平
次世代ポリオレフィン総合研究，16，63（2023）

Structural and morphological changes at initial state under uniaxial elongation of rolled polytetrafluoroethylene
Asae Ito, Mio Sakuragi, Daisuke Kimura, Kazufumi Toda, Shunichi Shimatani, Koh-Hei Nitta
Polymer Testing,Volume 128,108208 (2023)
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A Phenomenological Model for Enthalpy Recovery in Polystyrene Using Dynamic Mechanical Spectra
Koh-hei Nitta, Kota Ito,Asae Ito
Polymers, 15(17), 3590（2023）
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In-situ observation of falling-weight impact damage in isotactic polypropylene sheet
Ryohei Ippitsu, Takamasa Okuda, Asae Ito, Koh-hei Nitta, Yusuke Hiejima
Polymer, 283, 126225 (2023)
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A nonequilibrium constitutive equation for the stress–strain behavior of water-absorbed poly(methyl methacrylate)-based materials
Asae Ito, Arisa Shin and Koh-hei Nitta
Polymer Engineering and Science/ Volume 63,Issue 7/p.2233-2240（2023）
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On a thermodynamic foundation of Eyring rate theory for plastic deformation of polymer solids
Koh-hei Nitta
Philosophical Magazine Letters, , 103,1,2186190, (2023)
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Additive Effects of Solid Paraffins on Mechanical Properties of High-Density Polyethylene
Asae Ito, Akid Ropandi, Koichi Kono, Yusuke Hiejima and Koh-hei Nitta
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Polymers, 15,1320 (2023)

固形パラフィンの高密度ポリエチレンへの添加効果
伊藤麻絵，モハマド・アキド，新田晃平
次世代ポリオレフィン総合研究, 15, 48 (2022)

イソタクチックポリプロピレンの面衝撃による損傷に関する研究
一筆稜平，比江嶋祐介，新田晃平
次世代ポリオレフィン総合研究, 15, 31 (2022)

Viscoelastic Properties of Water-Absorbed Poly(methyl methacrylate) Doped with Lithium Salts with Various Anions
Asae Ito, Arisa Shin and Koh-hei Nitta
Molecules, 27, 7114 (2022)
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Additive effects of lithium halides on the tensile and rheological properties of poly(methylmethacrylate)
Asae Ito, Arisa Shin, Koh-hei Nitta
Polymer Journal, 54, 1279–1285 (2022)
Rising stars2022特集号
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Rheo-Raman Spectroscopic Study of Microscopic Deformation Behavior of Low- and High-Density Polyethylene Solids under Uniaxial Deformation
Takumitsu Kida, Yusuke Hiejima, Koh-hei Nitta, Masayuki Yamaguchi
レオロジー学会誌, 50, 287–294 (2022)
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Evaluation of microscopic structural changes during strain hardening of polyethylene solids using In situ Raman, SAXS, and WAXD measurements under step-cycle test
Takumitsu Kida, Yusuke Hiejima, Koh-hei Nitta, Masayuki Yamaguchi
Polymer, 250, 124869 (2022)
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Rheological and Mechanical Properties of Poly(methyl methacrylate) Associated with Lithium Salts
Asae Ito and Koh-hei Nitta
レオロジー学会誌50巻記念号総説, 50,87–93 (2022)
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高密度ポリエチレンにおける流動パラフィン添加による動的粘弾性特性への影響
伊藤麻絵，日置かおり，河野公一，比江嶋祐介，新田晃平
次世代ポリオレフィン総合研究, 14, 39 (2021)

レオオプチックスによる結晶性高分子の一軸および二軸延伸過程における分子配向挙動の解析
新田晃平
繊維学会誌, 77, 12,649-653 (2021)
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Rheological and mechanical properties of Poly (Methyl Methacrylate) doped with lithium salts
Asae Ito, Arisa Shin, and Koh-hei Nitta
Polymer Journal, 54, 41–46 (2022)
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Additive Effects of Lithium Salts with Various Anionic Species in Poly (Methyl Methacrylate)
Asae Ito and Koh-hei Nitta
Molecules, 26(13), 4096(2021)
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Topological Characteristics of Chain Molecules with Branching and Molar‐Mass Distributions
Koh-hei Nitta
Macromolecular Theory and Simulations, 2000080, 7(2021)
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Improving the Strength of Polyethylene Solids by Simple Controlling of the Molecular Weight Distributiony
Takumitsu Kida, Ryo Tanaka, Yusuke Hiejima, Koh-hei Nitta, Takeshi Shiono
Polymer, 218, 123526(2021)
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Microstructural Interpretation of Influences of Molecular Weight on the Tensile Properties of High-Density Polyethylene Solids Using Rheo-Raman Spectroscopy
Takumitsu Kida, Yusuke Hiejima, Koh-hei Nitta
Macromolecules, 54, 225(2021)
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In situ Raman spectroscopic observation of polymer chains in semi-crystalline polyethylene solids
Yusuke Hiejima, Takumitsu Kida, Koh-hei Nitta
Z. Phys. Chem., 235, 59 (2021)
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Effects of Liquid Paraffin on Dynamic Mechanical Properties of Linear High-Density Polyethylene
Asae Ito, Kaori Hioki, Koichi Kono, Yusuke Hiejima, Koh-hei Nitta
Macromolecules, 53, 8459 (2020)
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Microscopic Origin of Elastic and Plastic Deformation in Poly(ether-block amide) Elastomers under Various Conditions
Takumitsu Kida, Keisuke Hamasaki, Yusuke Hiejima, Shuichi Maeda, Koh-hei Nitta
レオロジー学会誌, 48, 153 (2020)
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Rheo-Raman Spectroscopic Study of Plasticity and Elasticity Transformation in Poly(ether-block-amide) Thermoplastic Elastomers
Takumitsu Kida, Taisei Sasaki, Yusuke Hiejima, Shuichi Maeda, Koh-hei Nitta
Polymer, 189, 122128 (2020)
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Swelling behavior of butyl and chloroprene rubber composites with poly(sodium acrylate) showing high water uptake
Yuya Oyama, Yusuke Hiejima, Koh-hei Nitta
Journal of Applied Polymer Science, 136, 48535 (2019)
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Surface damage characterization of photodegraded low-density polyethylene by means of friction measurements
Toshio Igarashi, Soichiro Ohno, Sayaka Oda, Satoru Hirosawa, Yusuke Hiejima, Koh-hei Nitta
Journal of Polymer Engineering, 39, 805 (2019)
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Rheo-Raman Spectroscopic Study on Uniaxial Deformation Behavior of High-Density Polyethylene Solids with Various Molecular Weight Distributions
Takumitsu Kida, Yusuke Hiejima, Koh-hei Nitta
Macromolecules, 52, 4590 (2019)
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Orientation behavior and deformation mechanism of polyethylene gels during cold drawing detected by in situ Raman spectroscopy
Yusuke Hiejima, Takamasa Okuda, Koichi Kono, Koh-hei Nitta
Polymer, 176, 30 (2019)
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A stochastic equation for predicting tensile fractures in ductile polymer solids
Koh-hei Nitta, Chun-yao Li
Physica A: Statistical Mechanics and its Applications, 490, 1076 (2018)
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Rheo-Raman Spectroscopic Study of Microscopic Deformation Behavior for Ultra Low-density Polyethylene
Takumitsu Kida, Yusuke Hiejima, Koh-hei Nitta
Polymer International, 67, 1335 (2018)
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In Situ Monitoring of Orientation Parameters and Orientation Distribution Functions of Polyethylenes during Tensile Tests
Yusuke Hiejima, Takumitsu Kida, Koh-hei Nitta
Macromolecular Symposia, 377, 1700020 (2018)
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Rheo-Raman Study of Isotactic Polypropylene Under Tensile Deformation
Takumitsu Kida, Yusuke Hiejima, Koh-hei Nitta
Macromolecular Symposia, 377, 1700019 (2018)
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Microscopic structural changes during photodegradation of low-density polyethylene detected by Raman spectroscopy
Yusuke Hiejima, Takumitsu Kida, Kento Takeda, Toshio Igarashi, Koh-hei Nitta
Polymer Degradation and Stability, 150, 67 (2018)
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ラマン分光法を用いた結晶性ポリオレフィン材料の微視的変形挙動の解析
木田拓充、比江嶋祐介、新田晃平
高分子論文集 (総合論文), 75, 497 (2018)
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Effect of pore size distribution on compressive behavior of moderately expanded low-density polyethylene foams
Takashi Uneyama, Tatsuya Yamazaki, Toshio Igarashi, Koh-hei Nitta
Polymer Engineering and Science, 59, 510 (2018)
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高分子固体の構造と力学物性に関する数理的ならびに実験的研究
新田晃平
日本レオロジー学会誌, 46, 195 (2018)
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Tensile Properties in β-Modified Isotactic Polypropylene
Koh-hei Nitta, Tsutomu Takashima
in Polypropylene (2018)
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Effects of poly(propylene carbonate) additive prepared from carbon dioxide on the tensile properties of polypropylene
Etsuko Takubo, Yusuke Hiejima, Kiyoshi Nishioka, Koh-hei Nitta
Journal of Applied Polymer Science, 134, 45266 (2017)
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Investigation of the Molecular Mechanisms of Melting and Crystallization of Isotactic Polypropylene by in Situ Raman Spectroscopy
Yusuke Hiejima, Kento Takeda, Koh-hei Nitta
Macromolecules, 50, 5867 (2017)
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Effect of Strain Rate on Microscopic Deformation Behavior of High-density Polyethylene under Uniaxial Stretching
Takumitsu Kida, Yusuke Hiejima, Koh-hei Nitta
MATEC Web of Conferences, 139, 05001 (2017)
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Transparent Woody Film Made by Dissolution of Finely Divided Japanese Beech in Formic Acid at Room Temperature
Yuri Nishiwaki-Akine, Sui Kanazawa, Takashi Uneyama, Koh-hei Nitta,
Ryoko Yamamoto-Ikemoto, Takashi Watanabe
ACS Sustainable Chemistry & Engineering, 5, 11536 (2017)
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On the orientation-induced crystallization of polymers
Koh-hei Nitta
Polymers, 8, 229 (2016)
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Mechanical Properties of Plasticized Cellulose Ester Films at Room and High Temperatures
Mohd Edeerozey Abd Manaf, Koh-hei Nitta, Masayuki Yamaguchi
ARPN Journal of Engineering and Applied Sciences, 11, 2354 (2016)
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Hydrothermal Synthesis of Photoluminescent Nanocarbon from Hydroxylic Acids and Amines
Yusuke Hiejima, Mitsuhiro Kanakubo
Journal of Solution Chemistry, 45, 1560 (2016)
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Compressive Behavior of Moderately Expanded Low Density Polyethylene (LDPE) Forms
Takashi Uneyama, Tetsuhiro Honda, Toshio Igarashi, Koh-hei Nitta
Nihon Reoroji Gakkaishi, 44, 29 (2016)
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Raman Spectroscopic Study of High-density Polyethylene during Tensile Deformation
Takumitsu Kida, Yusuke Hiejima, Koh-hei Nitta
International Journal of Experimental Spectroscopic Techniques, 1, 001 (2016)
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高分子材料における破壊現象の理論的考察
新田晃平
高分子論文集 (総説), 73, 281 (2016)
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Molecular orientation behavior of isotactic polyoropylene under uniaxial stretching by rheo-Raman spectroscopy
Takumitsu Kida, Yusuke Hiejima, Koh-hei Nitta
Express Polymer Letters, 10, 701 (2016)
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Rheo-Raman Spectroscopic Study of Uniaxial Plastic Deformation Behavior in High-Density Polyethylene Solids
Yusuke Hiejima, Takumitsu Kida, Koh-hei Nitta
Advances in Materials Science Research, 20, Chapter 2 (2015)
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Three dimensional molecular orientation of isotactic polypropylene films under biaxial deformation at higer temperatures
Koh-hei Nitta, Takayuki Sawada, Shingo Yoshida, Takanobu Kawamura
Polymer, 74, 30 (2015)
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Structural Interpretation of Eyring Activation Parameters for Tensile Yielding Behavior of Isotactic Polypropylene Solids
Rui Gao, Mizue Kuriyagawa, Koh-hei Nitta, Xuelian He, Boping Liu
Journal of Macromolecular Science, Part B, 54, 1196 (2015)

Rheo-optical Raman study of microscopic deformation in high-density polyethylene under hot drawing
Takumitsu Kida, Yusuke Hiejima, Koh-hei Nitta
Polymer Testing, 44, 30 (2015)
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Deformation mechanism of high-density polyethylene probed by in situ Raman spectroscopy
Takumitsu Kida, Tatsuya Oku, Yusuke Hiejima, Koh-hei Nitta
Polymer, 58, 88 (2015)
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Statistical analysis of the strength and lifetime under tension of crystalline polymeric solids
Chun-yao Li, Koh-hei Nitta
Journal of Physics: Conference Series, 622, 012018 (2015)
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Statistical aspects of tensile fracture of isotactic polypropylene
Chun-yao Li, Koh-hei Nitta
Journal of Macromolecular Science, Part B: Physics, 54, 1053 (2015)
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Stress-strain behavior of cold-drawn isotactic polypropylene subjected to various drawn histories
Hitomi Nomura, Koh-hei Nitta
Polymer, 55, 6614 (2014)
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Self-consistent field model simulations for statistics of amorphous polymer chains in crystalline lamellar structure
Takashi Uneyama, Takafumi Miyata, Koh-hei Nitta
Journal of Chemical Physics, 141, 164906 (2014)
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In situ near-infrared spectroscopic studies of the structural changes in polyethylene during tensile deformation
Masami Mizushima, Takanobu Kawamura, Kenji Takahashi, Koh-hei Nitta
Polymer Testing, 38, 81 (2014)
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ラマン分光から見た高密度ポリエチレンの構造変化
比江嶋祐介、木田拓充、新田晃平
次世代ポリオレフィン総合研究, 8, 77 (2014)
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On ductile fracture mechanism under tension in semicrystalline polymers
Koh-hei Nitta, Chun-yao Li
Nihon Reoroji Gakkaishi, 41, 167 (2013)
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Influence of thermo-degradation on the crystallization kinetics of isotactic polypropylene with a β-nucleating agent
Shengying Qian, Toshio Igarashi, Koh-hei Nitta
Journal of Macromolecular Science, Part B: Physics, 52, 48 (2013)
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Characterization of molecular orientation under tensile deformation by near infrared spectroscopy
Masami Mizushima, Takanobu Kawamura, Kenji Takahashi, Koh-hei Nitta
E-Polymers, 068 (2012)
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Molecular orientation behavior of isotactic polypropylene films under uniaxial and biaxial deformation at elevated temperatures
Shingo Yoshida, Takayuki Sawada, Takanobu Kawamura, Koh-hei Nitta
International Polymer Processing, 27, 237 (2012)
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Application of catastrophe theory to neck initiation of metallocene-catalyzed high-density polyethylene
Koh-hei Nitta, Mizue Kuriyagawa
Polymer Journal, 44, 245 (2012)
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In situ near-infrared spectroscopic studies of the structural changes of polyethylene during melting
Masami Mizushima, Takanobu Kawamura, Kenji Takahashi, Koh-hei Nitta
Polymer Journal, 44, 162 (2012)
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Semicrystalline structure and mechanical properties of polyolefin-based materials
Mizue Kuriyagawa, Koh-hei Nitta
Advanced Materials Research, 441, 713 (2012)
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A novel phenolic rigid organic filler/isotactic polypropylene blend
Dongming Qi, Rui Zhang, Jie Xu, Xingcong Shen, Koh-hei Nitta
Advanced Materials Research, 441, 536 (2012)
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Investigation of a rheo-optical method for determining the in-situ molecular orientation behavior in stretching films under biaxial deformation
Shingo Yoshida, Takayuki Sawada, Takanobu Kawamura, Koh-hei Nitta
Polymer Testing, 30, 893 (2011)
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Thermal degradation behavior of polyoropylene in the melt state: Molecular weight distribution changes and chain scission mechanism
Shengying Qian, Toshio Igarashi, Koh-hei Nitta
Polymer Bulletin, 67, 1661 (2011)
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Structural explanation on natural draw ratio of metallocene-catalyzed high density polyethylene
Mizue Kuriyagawa, Koh-hei Nitta
Polymer, 52, 3469 (2011)
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Effects of addition of hindered phenol compounds to a segmented polyurethane with shape memory on mechanical yielding
Mizue Kuriyagawa, Takanobu Kawamura, Shunichi Hayashi, Koh-hei Nitta
Journal of Materials Science, 46, 1264 (2011)
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Molecular orientation behavior of mesomorphic isotactic polypropylene under uniaxial and biaxial deformation
Shingo Yoshida, Kazuomi Ishii, Takanobu Kawamura, Koh-hei Nitta
Polymer Engineering and Science, 51, 225 (2011)
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