English Abstract

Synthesis of Modified Styrene Butadiene Rubber Latex Containing Triethoxysilyl Group and Its in situ Silica Filling Kiyoshi Sunada,Hiroki Takeshita,Masamitsu Miya,Tsukasa Nakamura, Katsuhiko Takenaka,Tomoo Shiomi Department of Materials Science and Technology, Nagaoka University of Technology Niigata,Japan Nippon Gomu Kyokaishi,(2003),76(7), 234-239 Original Paper in Japanese. Abstract Triethoxysilyl modified styrene butadiene rubber latex was synthesized by the emulsion copolymerization of 2-(3-triethoxysilylpropyl)-1,3-butadiene with styrene and 1,3-butadiene. This latex was mixed with unmodified SBR latex and tetraethoxysilane to obtain SBR-silica composites by sol-gel reaction in the latex. Evaluation of mechanical properties demonstrated that tensile modulus and tensile strength, elongation at break improved with increasing of the amount of modified SBR. SEM observation for SBR-silica composites suggested that particle size of silica dispersed in unvulcanized rubber matrix grew larger with decreasing of silica content. Keywords: Silica,Silane coupling agent,2-(3-triethoxysilylpropyl)-1,3-butadiene,Styrene-butadiene rubber,Latex, Sol-gel method

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