Structure and Properties of High-performance Car Tire Tread Compound Prepared by Wet Mixing
It is of great significance to develop energy-saving green rubber processing technol-ogy and high performance(oil-saving)rubber nanocomposites for high-quality rubber prod-ucts.In this paper,the solution polymerized styrene-butadiene rubber(SSBR)solution and silica(SiO2)suspension were wet-mixed to prepare M-SSBR/SiO2 compound without dust pollution.Then,the M-SSBR/BR/SiO2 was further obtained by mechanically blending the M-SSBR/SiO2 compound with butadiene rubber(BR),and the structure and properties were studied.The bound rubber content of M-SSBR/BR/SiO2 compound was 27%higher than that of the SSBR/BR/SiO2 compound prepared by traditional mechanical mixing;and the Payne effect of M-SSBR/BR/SiO2 compound was greatly weakened,implying significantly improved filler dispersion.In addition,the modulus at 300%and the resilience of M-SSBR/BR/SiO2 vulcanizates increased 17%and 16%,respectively;and the tan δ@60℃and heat build-up of M-SSBR/BR/SiO2 vulcanizates decreased 24%and 30%,respectively.There-fore,M-SSBR/BR/SiO2 tread compound prepared by wet mixing technology showed excel-lent 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.
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