The performance of butyl, chlorobutyl, bromobutyl, and brominated isobutylene-co-para-methylstyrene (BIMS) rubbers were evaluated versus a solution-polymerized styrene-butadiene rubber with 20% bound styrene in model winter tire tread formulations containing natural rubber and butadiene rubber. Isobutylene-based elastomer performance was compared in carbon black-filled and silane-coupled silica-filled systems. Based on laboratory dynamic properties predictive of wet and winter traction, and on DIN abrasion index values, BIMS is the elastomer of choice affording increased tangent delta values between 0℃ and -40℃, and the highest DIN abrasion index values of the isobutylene-based elastomers. Evaluation of BIMS/NR/BR blends in model compounds show its utility as a tread polymer for improving winter performance.
展开▼
机译:在含天然橡胶和丁二烯橡胶的冬季轮胎胎面配方中,对丁基,氯丁基,溴化丁基和溴化异丁烯-对-甲基苯乙烯(BIMS)橡胶与含20%苯乙烯的固溶丁苯橡胶的性能进行了评估。在填充炭黑和硅烷偶联二氧化硅的体系中比较了异丁烯基弹性体的性能。根据预测潮湿和冬季牵引的实验室动态特性以及DIN耐磨指数值,BIMS是选择的弹性体,可提供正切增量在0℃至-40℃之间的值,并且异丁烯基的DIN耐磨指数最高弹性体。对BIMS / NR / BR共混物在模型化合物中的评估显示出其作为提高冬季性能的胎面聚合物的效用。
展开▼