湿法混炼制备高性能轿车胎胎面胶及其结构与性能

Structure and Properties of High-performance Car Tire Tread Compound Prepared by Wet Mixing

采用无粉尘污染的湿法混炼工艺将溶聚丁苯橡胶(SSBR)和白炭黑制备成湿法混炼胶M-SSBR/SiO_(2),再与顺丁橡胶(BR)通过机械混炼制备成轿车轮胎胎面混炼胶M-SSBR/BR/SiO_(2),并对其进行结构与性能研究。结果表明:与传统机械混炼制备的胎面混炼胶SSBR/BR/SiO_(2)相比,M-SSBR/BR/SiO_(2)的结合胶含量提高27%;并且Payne效应大幅度降低,说明填料分散性显著改善;M-SSBR/BR/SiO_(2)硫化胶的300%定伸模量提高17%,回弹性能提高16%,表征滚动阻力的60℃的tanδ降低24%,压缩生热降低30%。

It is of great significance to develop energy-saving green rubber processing technology and high performance(oil-saving)rubber nanocomposites for high-quality rubber products.In this paper,the solution polymerized styrene-butadiene rubber(SSBR)solution and silica(SiO_(2))suspension were wet-mixed to prepare M-SSBR/SiO_(2) compound without dust pollution.Then,the M-SSBR/BR/SiO_(2) was further obtained by mechanically blending the M-SSBR/SiO_(2) compound with butadiene rubber(BR),and the structure and properties were studied.The bound rubber content of M-SSBR/BR/SiO_(2) compound was 27%higher than that of the SSBR/BR/SiO_(2) compound prepared by traditional mechanical mixing;and the Payne effect of M-SSBR/BR/SiO_(2) compound was greatly weakened,implying significantly improved filler dispersion.In addition,the modulus at 300%and the resilience of M-SSBR/BR/SiO_(2) vulcanizates increased 17%and 16%,respectively;and the tanδ@60℃and heat build-up of M-SSBR/BR/SiO_(2) vulcanizates decreased 24%and 30%,respectively.Therefore,M-SSBR/BR/SiO_(2) tread compound prepared by wet mixing technology showed excellent filler dispersion and comprehensive properties,especially lower rolling resistance and heat build-up,which is an ideal compound for the development of green oil-saving tire.