具有不同序列分布集成橡胶的性能

摘要

Effect factors of sequence distribution of styrene-isoprene-butadiene terpolymer ( SIBR ), including content of pendant groups, monomer ratio and block structure were dis-cussed, and effect of the factors on properties of SIBR was in-vestigated.The results showed that with increase of 1,2-poly-butadiene and 3,4-polyisoprene structures, glass transition tem-perature of SIBR increased , wet skid resistance improved grad-ually, and rolling resistance was lower for all samples.For atactic copolymer , the wet skid resistance was affected signifi-cantly by monomer ratio , and the rolling resistance could be de-creased by synthesizing block SIBR with stepwise feeding mode .%探讨了影响苯乙烯-异戊二烯-丁二烯三元共聚橡胶（集成橡胶SIBR ）序列分布的各种因素，包括侧基结构含量、单体配比、嵌段结构等，并分析了这些因素对SIBR性能的影响。结果表明，随着聚合物中1，2-聚丁二烯和3，4-聚异戊二烯结构含量的增加，SIBR的玻璃化转变温度升高，抗湿滑性能也逐渐提高，所有试样的滚动阻力均较低。对于全无规聚合物而言，单体配比主要影响其抗湿滑性能。采用分步加料方式制备嵌段结构的SIBR可以降低其滚动阻力。