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  1. No Access

    Article

    Crystallization behavior of biodegradable poly(L-lactic acid) (PLLA)/poly(butylene succinate) (PBS) blends based on in situ simultaneous wide-angle x-ray diffraction/small-angle x-ray scattering techniques and thermal analyses

    Crystalline behavior of poly(L-lactic acid) (PLLA), polybutylene succinate (PBS) and their (PLLA/PBS) blends were investigated using differential scanning calorimetry, dynamic viscoelastic property, in situ si...

    Yasushi Kadowaki, Ken Kojio in Journal of Polymer Research (2022)

  2. No Access

    Article

    Visualization of judgment regions in convolutional neural networks for X-ray diffraction and scattering images of aliphatic polyesters

    The construction of a deep learning model and visualization of judgment regions were conducted for X-ray diffraction and scattering images of aliphatic polyesters. Due to recent progress in measurement methods...

    Yoshifumi Amamoto, Hiroteru Kikutake, Ken Kojio, Atsushi Takahara in Polymer Journal (2021)

  3. No Access

    Article

    Microdomain structure change and macroscopic mechanical response of styrenic triblock copolymer under cyclic uniaxial and biaxial stretching modes

    The mechanical stretching behavior of the poly(styrene-b-ethylene-co-butylene-b-styrene) (SEBS) triblock copolymer (87 wt% polyethylene-co-butylene (PEB), 13 wt% polystyrene (PS)) was investigated under three dif...

    Nattanee Dechnarong, Kazutaka Kamitani, Chao-Hung Cheng, Shiori Masuda in Polymer Journal (2021)

  4. No Access

    Article

    Evaluation of viscoelastic properties, hardness, and glass transition temperature of soft denture liners and tissue conditioner

    Soft denture liners and tissue conditioners are widely used for the denture patients to cushion masticatory force and condition abused tissues, respectively. This study assessed methods for the evaluation of t...

    Yukiro Kitagawa, Kazuhiro Yoshida, Kazuma Takase, Alireza Valanezhad in Odontology (2020)

  5. No Access

    Article

    Crystal polymorphism of polylactide and its composites by X-ray diffraction study

    Polylactide (PLA) exhibits various types of crystal modifications depending on the preparation conditions, including the components. To solve the open question, a reliable calculation method for crystallinity,...

    Ya-Ting Hsieh, Shuhei Nozaki, Makoto Kido, Kazutaka Kamitani, Ken Kojio in Polymer Journal (2020)

  6. No Access

    Article

    Influence of chemical structure of hard segments on physical properties of polyurethane elastomers: a review

    Hard segments of polyurethanes (PUs) are generally formed from diisocyanate and diol. Diol can be replaced with triol and thiol. These chemical structures of hard segments strongly affect not only a microphase...

    Ken Kojio, Shuhei Nozaki, Atsushi Takahara, Satoshi Yamasaki in Journal of Polymer Research (2020)

  7. No Access

    Article

    Lamellar orientation in isotactic polypropylene thin films: a complement study via grazing incidence X-ray diffraction and surface/cross-sectional imaging

    The crystalline structures of isotactic polypropylene (iPP) thin films were investigated using grazing incident wide-angle X-ray diffraction (GIWAXD), atomic force microscopy (AFM), and transmission electron m...

    Kiminori Uchida, Kazuki Mita, Yuji Higaki, Ken Kojio, Atsushi Takahara in Polymer Journal (2019)

  8. No Access

    Article

    Microphase-separated structure and mechanical properties of cycloaliphatic diisocyanate-based thiourethane elastomers

    Polythiourethane (PTU) and polyurethane (PU) elastomers were prepared from poly(oxytetramethylene) glycol, 1,4-bis(isocyanatomethyl) cyclohexane and a dithiol or diol chain extender with two methylene numbers ...

    Rahmawati Rahmawati, Shuhei Nozaki, Ken Kojio, Atsushi Takahara in Polymer Journal (2019)

  9. Article

    Inclusion of fullerene in polymer chains grafted on silica nanoparticles in an organic solvent

    Dispersion of C60/silica nano-composite, prepared by inclusion of C60 into grafted polymer chains on silica, in organic solvent and poly(methyl methacrylate) (PMMA) matrix was investigated. The polymer-grafted Si...

    Kohji Yoshinaga, Yin Yang, Teruhisa Ohno, Suguru Motokucho, Ken Kojio in Polymer Journal (2014)

  10. Article

    Physical properties of poly(tetrahydrofuran)-block-poly(2-ethyl-2-oxazoline) triblock copolymer

    ABA-type triblock copolymers (PEOxz-PTHF-PEOxz) composed of poly(tetrahydrofuran) (PTHF) and poly(2-ethyl-2-oxazoline) (PEOxz) were synthesized by cationic sequential polymerization. Differential scanning calo...

    Suguru Motokucho, Mutsuhisa Furukawa, Masahiro Kawashima, Ken Kojio in Polymer Journal (2013)

  11. No Access

    Article

    Effective dispersion of fullerene with methacrylate copolymer in organic solvent and poly(methyl methacrylate)

    Dispersion of fullerene, C60, by addition of polymethacrylate dispersant in methyl methacrylate (MMA) and incorporation of C60 into poly(methyl methacrylate) (PMMA) were investigated. Copolymers synthesized by ra...

    Kohji Yoshinaga, Suguru Motokucho, Ken Kojio, Akemi Nakai in Colloid and Polymer Science (2012)

  12. Article

    Simultaneous small-angle X-ray scattering/wide-angle X-ray diffraction study of the microdomain structure of polyurethane elastomers during mechanical deformation

    Polyurethane elastomers (PUEs) were prepared with poly(oxytetramethylene) glycol (Mn=2000), 4,4′-diphenylmethane diisocyanate, 1,4-butanediol (BD) and 1,1,1-trimethylol propane (TMP) by a prepolymer method. To ev...

    Ken Kojio, Keisuke Matsuo, Suguru Motokucho, Kohji Yoshinaga in Polymer Journal (2011)

  13. Article

    High Performance Polyamide 6 Fibers Using Polycarbonate Based Thermoplastic Polyurethane Thin Film Coatings- a Novel Method

    Polycarbonate based thermoplastic polyurethanes (CPU2) were prepared and coated onto polyamide 6 (PA 6) fibers. The CPU2 thin film coatings were prepared by dip** the PA 6 fibers into a viscous CPU2 adduct a...

    Baiju John, Ken Kojio, Mutsuhisa Furukawa in Polymer Journal (2009)

  14. Article

    The Microphase-separated Structure of Polyurethane Bulk and Thin Films

    The microphase-separated structure of polyurethane bulk and thin films were investigated using atomic force microscopy (AFM). The polyurethane (PUs) were synthesized with poly(oxytetramethylene) glycol (PTMG),...

    Ken Kojio, So Kugumiya, Yusuke Uchiba, Yuichi Nishino in Polymer Journal (2009)

  15. No Access

    Article

    Properties of fish protein–hydrophilic polymer hybrid gels

    Biogels and bio-hybrid gels were prepared from myofibril of fish and their properties were evaluated. The muscular protein used was extracted from fish meat. After washing and centrifugal separation, the muscu...

    Mutsuhisa Furukawa, Ken Kojio, Yasumitsu Sakamoto, Yoshie Minamida in Polymer Bulletin (2007)

  16. Article

    Surface Relaxation Processes of Poly(methyl methacrylate) Brushes Prepared by Atom Transfer Radical Polymerization

    Well-defined poly(methyl methacrylate) (PMMA) brush layers were prepared onto silicon wafers by surface-initiated atom transfer radical polymerization using 2-(4-chlorosulfonylphenyl)-ethyltrichlorosilane as a...

    Keiji Tanaka, Ken Kojio, Reiko Kimura, Atsushi Takahara, Tisato Kajiyama in Polymer Journal (2003)

  17. No Access

    Chapter and Conference Paper

    Selective Adsorption of Plasma Protein Onto Phase-Separated Domain of Immobilized Organosilane Monolayer Surfaces

    The phase-separated surfaces of mixed organosilane monolayers on silicon wafer are excellent model system with which to study the interaction of proteins with organic surfaces. The phase-separated structures o...

    Atsushi Takahara, Ken Kojio, Shouren Ge in Advanced Biomaterials in Biomedical Engine… (1996)