纳米二氧化硅填充星形溶聚丁苯橡胶/二氧化硅共凝聚胶的结构与性能

Structure and properties of star-shaped solution polymerized styrene-butadiene rubber/silica co-coagulating rubber filled with nano-silica

研究了有机化纳米SiO2分别填充星形溶聚丁苯橡胶(SSBR)和SSBR/SiO2共凝聚胶(N-SSBR)的结构与性能。结果表明,纳米SiO2在N-SSBR中的混入速度明显快于SSBR,N-SSBR中的SiO2粉体呈纳米尺度分散,N-SSBR的玻璃化转变温度较星形SSBR高1～2℃。有机化纳米SiO2填充N-SSBR硫化胶的物理机械性能比其等量填充SSBR硫化胶的优异,其Payne效应小,分散性更好,玻璃化转变峰向高温偏移,损耗因子峰值降低,且60℃下的内摩擦损耗较低。

The structure and properties of starshaped solution polymerized styrene-butadiene rubber （SSBR） and nano-silica/SSBR co-coagulated rubber （N-SSBR）, and their composites filled with different amount of organically modified silica were studied. The results showed that the mixing rate of the modified silica with N-SSBR was faster than that with SSBR, and silica particles were dispersed in nano-size in N-SSBR. Compared with SSBR pure rubber, the glass transition temperature of N-SSBR same amount of silica possessed more excellent mechanical properties, lower Payne effect, better dispersion, lower peak value of internal friction loss, and its glass transition temperature shifted about 2℃ toward higher temperature. Furthermore, at 60℃, N-SSBR/siliea composite showed lower internal friction resistance than that of SSBR/silica composite.