The influence of molecular weight distribution of solution-polymerised styrene butadiene rubber on the properties of rubber mixes and vulcanisates

摘要

In recentyears, developments in the field of the synthesis of solution-polymerised styrene butadiene rubbers (SSBRs) have been directed at improving the end service properties of tread rubber compounds based on them. Special attention has been paid to improving the wet road holding characteristics of tyres. This is ensured by using SSBRs with an increased content of vinyl units and styrene, which are characterised by high hysteresis losses of vulcanisates at temperatures close to 0°C. On the other hand, at 60°C, which corresponds to tyre rolling at medium speed, the hysteresis losses of rubber compounds based on SSBR are reduced significantly and approach the properties of rubber compounds based on stereoregular butadiene and isoprene rubbers [1-4].