カルボキシ-SBRとビニルピリジン-SBRとの混合について

概要

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Blends of carboxy-SBR and vinylpyridine-SBR, in which interactions between two polymers may exist, were investigated with various blend ratios by changing the blending methods and the curing systems. Blending of these polemers was carried out by using two methods ; i. e., blending in latex state and blending on the roll mill. The following curing agents were used in these blended polymers; (1) dicumyl peroxide as curing agents effective on two polymers, (2) zinc oxide and benzotrichloride as curing agents effective on carboxy-SBR and on vinylpyridine-SBR, respectively, in blended polymers, and (3) concurrent use of zinc oxide and benzotrichloride. The physical properties such as tensile properties and swelling in benzene were examined and dyeing of polymer mixture with methylene blue or fuchsin was tried in order to observe mixing states in these blends by microscope. From the results, the following points were clarified : (1) Better dispersion of the polymers was obtained by the method of latex blend and the dispersion was attained to such extent that interaction between polymers affect largely the physical properties. (2) In the case of concurrent use of zinc oxide and benzotrichrolide, interaction between the polymers became weak by the influence of the curing agents.
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