顺丁橡胶与丁苯橡胶在性能上的差别,在于其分子主链上缺少象苯基那样的侧基。而中乙烯基聚丁二烯的分子主链上有相当数量的乙烯基侧基,它弥补丁顺丁胶的不足之处。故日益受到人们的注意。目前,已工业化的中乙烯基聚丁二烯所用的催化剂为烷基锂体系,其聚合物除了1,2-结构外,其余部分反-1,4结构占多数。我们在前文曾经报 Butadiene rubber and styrene butadiene rubber in the performance difference is that the molecular backbone of the absence of phenyl-like side groups. However, the middle vinyl polybutadiene has a considerable amount of pendant vinyl groups on its molecular backbone, which makes up for the shortcomings of butadiene rubber. It is increasingly subject to the attention of people. At present, the catalyst used in the industrialized medium vinyl polybutadiene is the alkyl lithium system, the polymer except the 1,2 structure, the other part of the trans-1,4 structure is the majority. We have reported before