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Comparison of tensile stress relaxation behavior of graft copolymer of poly(vinyl acetate) with styrene and mechanical mixture of poly(vinyl acetate) with polystyrene

Authors

  • Toshiichi Soen,

    1. Department of Polymer Chemistry, Faculty of Engineering, Kyoto University, Kyoto, Japan
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  • Tzuneo Horino,

    1. Department of Polymer Chemistry, Faculty of Engineering, Kyoto University, Kyoto, Japan
    Current affiliation:
    1. Department of Textile Engineering, Art Industry and Textile, College of Kyoto, Kyoto, Japan
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  • Yasuo Ogawa,

    1. Department of Polymer Chemistry, Faculty of Engineering, Kyoto University, Kyoto, Japan
    Current affiliation:
    1. Textile Research Institute, Toyo Spinning Co., Ltd., Katada, Shiga-ken, Japan
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  • Koichi Kyuma,

    1. Department of Polymer Chemistry, Faculty of Engineering, Kyoto University, Kyoto, Japan
    Current affiliation:
    1. Urawa Mill, Fujikura Rubber Industry Co., Ltd., Urawa, Saitama-ken, Japan
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  • Hiromichi Kawai

    1. Department of Polymer Chemistry, Faculty of Engineering, Kyoto University, Kyoto, Japan
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  • Presented before the 14th Annual Symposium on Rheology, Japan, Tohoku University, Sendai, Oct. 29, 1965.

Abstract

As one in a series of studies relating the rheological behavior of mechanical mixtures of two polymer components to the degree of mixing, the tensile stress relaxation behavior of a graft copolymer of poly(vinyl acetate) with styrene, obtained by 60Co γ-irradiation of poly(vinyl acetate) in styrene solution and extraction of homopolymers, was investigated as a function of the fraction of styrene component and compared with that of a mechanical mixture of poly(vinyl acetate) with polystyrene, one of the typical combinations of incompatible components. The results obtained may classify the graft copolymer as a sort of mechanical mixture giving stable mixing even for incompatible components.

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