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  1. No Access

    Chapter

    Interfacial Characteristics of Amorphous Polystyrene and Binary Polymer Blend Thin Films Based on Scanning Force Microscopy

    Surface viscoelastic functions for monodisperse PS film was evaluated by using scanning viscoelasticity microscope(SVM). In the case of number average molecular weight, Mn less than ca. 30,000, it was revealed th...

    Atsushi Takahara, **qun Jiang in Interfacial Aspects of Multicomponent Poly… (1997)

  2. No Access

    Article

    Phase-Separation Behavior and Electro-Optical Properties for (Polymer/Liquid Crystal) Composite Films

    Dominant factors that control the aggregation structure and electro-optical properties were presented for (polymer/liquid crystal) composite films prepared by a solvent cast method from homogeneous solutions. ...

    Hirotsugu Kikuchi, Hwan-Kyeong Jeong, Tisato Kajiyama in MRS Online Proceedings Library (1996)

  3. Article

    Highly Crystalline Polyimide Particles

    Several kinds of highly crystalline polyimide particles were obtained by heating polyamic acid solutions at 180°C that induced the thermal imidization of polyamic acids in N-methyl-2-pyrrolidone (NMP). The morpho...

    Yasuhisa Nagata, Yuuki Ohnishi, Tisato Kajiyama in Polymer Journal (1996)

  4. Article

    Effect of Main-Chain Rigidity on Fatigue Behavior of Polymeric Fibers Based on Zone Nonlinear Viscoelastic Analysis

    Fatigue behavior of high-strength and high-modulus polymeric fibers was investigated based on nonlinear dynamic viscoelastic analysis under tension-tension cyclic strain condition. Poly(vinyl alcohol) (PVA) an...

    Tao Liang, Atsushi Takahara, Koichi Saito, Tisato Kajiyama in Polymer Journal (1996)

  5. Article

    Higher Order Structure and Thermo-Responsive Properties of Polymeric Gel with Crystalline Side Chains

    Crosslinked polymeric gel films were prepared by a radical copolymerization of stearyl acrylate (SA) and acrylic acid (AA) with N,N′-methylenebisacrylamide (MBAA) as a cross-linker. Aggregation structure of the (...

    **aowei He, Yushi Oishi, Atsushi Takahara, Tisato Kajiyama in Polymer Journal (1996)

  6. Article

    Control of Phase-Separated Structure in (Polymer/Liquid Crystal) Composite Films and Their Electro-Optical Switching Characteristics

    Phase-separation behavior and electro-optical properties were investigated for the composite films consisting of the three dimensional polymer network and low molecular weight liquid crystals (LCs) embedded in...

    Hirotsugu Kikuchi, Fumihiko Usui, Tisato Kajiyama in Polymer Journal (1996)

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    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)

  8. Article

    Mechanism of Electro-Optical Switching Hysteresis for (Polymer/Liquid Crystal) Composite Films

    The relationship between the hysteresis characteristics of electro-optical switching and the compatibility at the polymer–low molecular weight liquid crystal (LC) interface was studied for the (polymer/LC) com...

    Hirotsugu Kikuchi, Jun-ichiro Nishiwaki, Tisato Kajiyama in Polymer Journal (1995)

  9. No Access

    Article

    Novel concept for the aggregation structure of fatty acid monolayers on the water surface and direct observation of molecular arrangements in their monolayers

    The aggregation structure of fatty acid monolayers on water subphases of different pH’s was investigated by means of transmission electron microscopy. Fatty acid monolayers exhibited the phase transition from ...

    Tisato Kajiyama, Taishi Kuri in Bulletin of Materials Science (1995)

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    Article

    Novel Concepts of the Aggregation Structure of Organic Monolayers on the Surface of Water

    Tisato Kajiyama in MRS Bulletin (1995)

  11. Article

    Organic Thin Films: An Overview

    David G. Whitten, Tisato Kajiyama, Toyoki Kunitake in MRS Bulletin (1995)

  12. Article

    Improvement in Response Speed for Bistable Light Switching of (Liquid Crystalline Polymer/Low Molecular Weight Liquid Crystals) Ternary Composite System in Induced Smectic State

    Bistable light switching characteristics of the composite system composed of side chain type liquid crystalline polymer (LCP) and two kinds of low molecular weight liquid crystals (LCs) have been investigated....

    Jenn Chiu Hwang, Hirotsugu Kikuchi, Tisato Kajiyama in Polymer Journal (1995)

  13. Article

    Effect of Crystalline Relaxation on Fatigue Behavior of the Oriented High-Density Polyethylene Based on Nonlinear Viscoelastic Measurements

    Oriented high-density polyethylene (HDPE) specimens were prepared by drawing the HDPE film up to the draw ratio of 5.3 at 353 K corresponding to the crystalline relaxation temperature. Nonlinear viscoelasticit...

    Nam-Ju Jo, Atsushi Takahara, Tisato Kajiyama in Polymer Journal (1994)

  14. Article

    Optical Writing Effect for Liquid Crystalline Polymer/Photoisomerizable Molecule/Low Molecular Weight Liquid Crystal Ternary Composite System

    Kimiaki Nakamura, Hirotsugu Kikuchi, Tisato Kajiyama in Polymer Journal (1994)

  15. Article

    Component Dependence of Aggregation Structure and Light Scattering Properties of Polymer/Liquid Crystal Composite Films

    The aggregation structure and electro-optical properties of polymer/liquid crystal (LC) composite films were investigated. The aggregation structure of the composite film strongly depended on the components ra...

    Kwansun Park, Hirotsugu Kikuchi, Tisato Kajiyama in Polymer Journal (1994)

  16. Article

    Analysis of Fatigue Behavior of High-Density Polyethylene Based on Nonlinear Viscoelastic Measurement under Cyclic Fatigue

    Fatigue behaviors of annealed and isothermally crystallized high-density polyethylenes (HDPEs) were investigated on the basis of nonlinear dynamic viscoelastic measurement during the fatigue process. Nonlinear...

    Nam-Ju Jo, Atsushi Takahara, Tisato Kajiyama in Polymer Journal (1993)

  17. Article

    Preparation of 2-Dimensional Ultra Thin Polystyrene Film by Water Casting Method

    The preparation condition of polystyrene (PS) ultra thin film by a water casting method was investigated on the basis of transmission electron microscopic (TEM) observations. Homogeneous ultra thin films were ...

    Kenshiro Shuto, Yushi Oishi, Tisato Kajiyama, Charles C Han in Polymer Journal (1993)

  18. No Access

    Article

    Effect of side chain structure on aggregation state and mechanical properties of synthetic polypeptide monolayers at the air-water interface

    Aggregation structure of poly(γ-methyl-L-glutamate)(PMLG) and poly(γ-n-hexyl-L-glutamate)(PnHLG) monolayers at the air-water interface was investigated on the basis of the transmission electron microscopic obs...

    Tatsuya Tanizaki, Kyouta Hara, Atsushi Takahara, Tisato Kajiyama in Polymer Bulletin (1993)

  19. Article

    Aggregation State-Permeation Characteristic Relationships of Self-Supported Liquid Crystalline Membranes

    A series of built-up films composed of the blend materials of polymer and liquid crystal(LC) were prepared by a solvent-casting or a water-casting method. The weight fraction of LC in the composite membrane wa...

    Tisato Kajiyama, Atsushi Takahara, Hirotsugu Kikuchi in Polymer Journal (1991)

  20. No Access

    Chapter

    Polymer/(Liquid Crystal) Composite Membranes

    Polymer/(liquid crystal) composite membranes were cast from a solution of a mixture of polymeric and liquid crystalline materials. Also, the ultrathin membranes, about 20 nm thick, were formed by carefully spr...

    Tisato Kajiyama in Inclusion Aspects of Membrane Chemistry (1991)

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