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Article
Fatigue Behavior of Oriented Ultra-High Molecular Weight Polyethylene Prepared by Gel Drawing
High-modulus and high-strength PE specimens were prepared from the dry gel film of ultra-high molecular weight polyethylene (UHMWPE) and their fatigue behavior was investigated in terms of dynamic viscoelastic...
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Article
Effect of end group of side chains on surface properties of diblock copolymers
The A-B diblock copolymers with comb shape structure were prepared from styrene (St) and either methacrylate of poly(ethyleneglycol) monomethyl ether (MPEGM) or methacrylate of poly(ethyleneglycol) (HPEGM). Th...
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Chapter
Influence of Aqueous Environment on Surface Molecular Mobility and Surface Microphase Separated Structure of Segmented Poly(ether urethanes) and Segmented Poly(ether urethane ureas)
Segmented poly(ether urethanes) (SPUs) and segmented poly(ether urethane ureas) (SPUUs) with various hard and soft segment components were prepared. The surface characterization of SPU and SPUU in aqueous envi...
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Article
Aggregation Structure and Electro—Optical Properties of (Liquid Crystalline Polymer)/(Low Molecular Weight Liquid Crystal) Composite System
A series of thin films composed of liquid crystalline polymer (LCP) and low molecular weight liquid crystal (LMWLC) was prepared by a solventcasting method or by a bar—coating method. LCPs were of mesogenic si...
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Article
Fatigue Fracture Behavior of Solid-State Extruded High-Density Polyethylene
High-density polyethylene (HDPE) specimens for fatigue experiments were prepared by solid-state extrusion. Variations of dynamic viscoelasticity and surface temperature of the specimen were measured under cycl...
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Article
Effects of Ester Side Chain Structure on Gas Permeation Behavior of Poly(dialkylfumarate)s
The gas permeation behavior of poly(dialkylfumarate)s (PDAF)s with various bulky ester side chains has been studied. The thermal molecular motion and intermolecular distances depended on the bulkiness of ester...
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Article
Effect of Ester Side Chains on the Aggregation State and Surface Properties of Poly(dialkylfumarate)s
The aggregation state and surface properties of poly(dialkylfumarate)s (PDAFs) with various alkyl ester groups have been studied by X-ray diffraction, dynamic viscoelastic measurements, contact angle analysis,...
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Chapter
Effect of segment structure on fatigue behavior of segmented polyurethaneureas in pseudobiological environments
Segmented polyurethaneureas (SPUU) with various hard- and soft-segment components were prepared. The state of microphase separation was investigated by means of differential scanning calorimetry. After immersi...
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Article
Efficient Oxygen Enrichment by a Langmuir-Blodgett Film of the Polyion Complex of a Double-Chain Fluorocarbon Amphiphile
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Article
Aggregation States-Oxygen Permeability Relationships of Plasma-Polymerized Thin Films from Perfluorobenzene
The plasma polymerization method was applied to prepare organic thin films from perfluorobenzene (PFB) which have good affinity to oxygen. The aggregation structures and permeation properties of plasma-polymer...
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Article
X-Ray Structural Studies of Bilayers Composed of Monoalkyl-Monocation Type Artificial Amphiphiles
The membrane structure of hydrated monoalkyl-monocation type artificial amphiphiles was investigated by an X-ray diffraction method. The amphiphiles showed a thermotropic and lyotropic crystal-liquid crystal t...
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Article
Photoresponsive Permeation Characteristics of a Ternary Composite Membrane of Polymer/Artificial Lipid/Azobenzene Derivative
A ternary composite membrane composed of polymer/artificial lipid/azobenzene derivative was prepared by casting from a tetrahydrofuran solution of poly(vinyl chloride) (PVC), dioctadecyldimethylammonium bromid...
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Article
Gas Permeation through Polymer/Liquid Crystal Composite Membrane
Gas permeation was investigated for a polycarbonate (PC)/N-(4-ethoxy-benzylidene)-4′-butylaniline (EBBA) (=40/60 in wt%) composite membrane on the basis of its surface and internal structures. Scanning electron m...
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Chapter
Crystal-Liquid Crystal Phase Transformation of Synthetic Bimolecular Membranes
Bimolecular membrane of lipids are in a liquid crystalline state capable of reversible structural modifications and permeation properties of biomembranes depend upon such reversible change. Therefore, attempts...
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Article
Studies on Aggregation of Molecular Chains and Gas Permeation for Poly(spiro[2,4]hepta-4,6-diene) Composed of Rigid and Semi-Rigid Sequences
Poly(spiro[2,4]hepta-4,6-diene) (PSHD) is an amorphous random copolymer composed of 1,2 and 1,4 units, whose sequences form semi-rigid (intermediate between rigid and flexible) and rigid chains, respectively. ...
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Article
Variations of dynamic viscoelastic properties of dog compact bone during the fatigue process
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Article
Aggregated States and Solidifying Process of α-Helical Molecular Chains of Poly(γ-methyl glutamate)
The aggregated states of molecular chains of poly(γ-methyl glutamate) in various solvents were studied by means of X-ray diffraction and light scattering techniques. In this study, α-helical chains in a m-cresol ...
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Article
Ultrasonic Properties of Poly(γ-methyl D-glutamate) Film in the α-Helical Conformation under Pressure
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Article
Aggregated States of Molecular Chains in Solid-State Films of Poly(γ-n-alkyl D-glutamate) Cast from Various Solutions
The aggregated states of molecular chains in the crystalline region were studied for well annealed films of poly(γ-methyl D-glutamate) and poly(γ-n-hexyl D-glutamate) cast from various solutions. These crystallin...
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Article
Thermal Properties of Polyurethanes. Enthalpies and Entropies of Fusion
Enthalpies and entropies of fusion have been determined for two series of semicrystalline polyurethanes. The H series is based on 1,6-hexamethylene diisocyanate and various α, ω-diols containing from 2 to 10 m...
