密炼工艺及橡胶配比对溶聚丁苯橡胶/顺丁橡胶/白炭黑复合材料性能的影响

摘要

以硅烷偶联剂Si 69改性白炭黑,制备了溶聚丁苯橡胶(SSBrR)/顺丁橡胶(BR)/白炭黑复合材料,考察了密炼工艺和橡胶配比对复合材料性能的影响,研究了白炭黑在橡胶基体中的分散性.结果表明,采用合适的密炼工艺可提高白炭黑的硅烷化程度,促进橡胶基体与白炭黑的相互作用,可改善SSBR/BR/白炭黑复合材料的抗湿滑性能和拉伸强度;采用相同密炼工艺,当SSBR/BR(质量比)由75/25增大至103/25时,SSBR/BR/白发黑复合材料的拉伸强度变化不大,而回弹性有所提高,压缩生热明显下降,抗湿滑性能提高了26％,滚动阻力下降了21％.%Silica was modified with silane coupling agent Si 69,and the solution polymerized styrene-butadiene rubber (SSBR)/cis-1,4-polybutadiene rubber (BR)/silica composites were prepared.The effects of different mixing process and rubber blending ratio on the properties of SSBR/BR/silica composites were investigated and the dispersion of silica in the rubber matrix was also studied.The results showed that the suitable mixing process could promot the silanized degree of silica and improve the interaction of rubber matrix and silica,meanwhile enhance the wet skid resistance and tensile strength of the composites.By using the same mixing process,when SSBR/BR (mass ratio) increased from 75/25 to 103/25,the tensile strength of the composites had no evident change,while the resilience was improved and the compression heat build-up decreased obviously.The dynamic mechanical property was improved greatly,wet skid resistance increased by 26％,and rolling resistance decreased by 21％.