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首页> 外文期刊>Journal of Applied Polymer Science >In situ silica reinforcement of vinyltriethoxysilane-grafted styrene-butadiene rubber by sol-gel process
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In situ silica reinforcement of vinyltriethoxysilane-grafted styrene-butadiene rubber by sol-gel process

机译：溶胶-凝胶法原位二氧化硅增强乙烯基三乙氧基硅烷接枝的丁苯橡胶

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摘要

Grafting polymerization of vinyltriethoxysilane (VTES) onto styrene-butadiene rubber (SBR) was firstly carried out in latex, using potassium persulfate (KPS) as initiator. The grafted SBR was further reinforced with silica produced by sol-gel reaction of tetraethoxysilane (TEOS). The grafted of VTES onto SBR was characterized and confirmed by ATR-FTIR and 1H-NMR. Results revealed that the addition of VTES could considerably improve the content of silica, bound rubber in SBR and utilized efficiency of TEOS. Meanwhile, the curing characteristics and mechanical properties of the vulcanized in situ reinforced SBR-g-VTES were also investigated and compared with that of the silica-reinforced SBR prepared by mechanical mixing. The delta torque, tensile, and tear strength of in situ reinforced SBR-g-VTES were higher than that of silica-reinforced SBR. Dynamic mechanical analysis showed that the interaction between silica and SBR of in situ reinforced SBR-g-VTES was also better than that of the silica-reinforced SBR.
机译：乙烯基三乙氧基硅烷（VTES）在苯乙烯-丁二烯橡胶（SBR）上的接枝聚合首先是在乳胶中使用过硫酸钾（KPS）作为引发剂进行的。接枝的SBR用四乙氧基硅烷（TEOS）的溶胶-凝胶反应制得的二氧化硅进一步增强。用ATR-FTIR和1H-NMR表征和证实了VTES接枝到SBR上。结果表明，添加VTES可以显着提高二氧化硅，SBR中胶结橡胶的含量以及TEOS的利用效率。同时，还研究了硫化的原位增强SBR-g-VTES的固化特性和力学性能，并将其与通过机械混合制备的二氧化硅增强SBR的固化特性和力学性能进行了比较。原位增强的SBR-g-VTES的增量扭矩，拉伸强度和撕裂强度高于二氧化硅增强的SBR。动态力学分析表明，原位增强的SBR-g-VTES中二氧化硅与SBR之间的相互作用也比二氧化硅增强的SBR更好。

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