Compatibility and properties of SSBR of different microstructures with BR blends
Solution-polymerized styrene butadiene rubber(SSBR)with different contents of vinyl and styrene were blended with butadiene rubber(BR),and the effects of the microstructure of SSBR on the compatibility,vulcanization properties,static mechanical properties,dynamic mechanical properties and wear properties of the blends were studied.The results showed that when SSBR with medium or high styrene content was blended with BR,the vulcanization rate increased,Mooney viscosity and glass transition temperature decreased;and the processing performance and low temperature resistance were improved,but the payne effect and compression heat build-up increased,and the wet skid resistance decreased.With the decrease of the solubility parameter difference between SSBR and BR,the shift of glass transition temperature to low temperature direction gradually increased,and the compatibility of blends increased,which was conducive to the improvement of abrasion performance.
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