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近年来,可使双烯烃进行高顺式定向聚合的稀土催化剂以其独有的一些特点及对传统Ziegler-Natta催化剂所带来的新发展,引起了人们很大的注意.目前已知的较为有效的稀土催化剂大致可分为以各种不含卤素的稀土化合物配合烷基铝及含卤路易斯酸
In recent years, the rare-earth catalysts which can make the cis-direction polymerization of diolefins have attracted a great deal of attentions because of their unique characteristics and new developments brought by the traditional Ziegler-Natta catalysts. Effective rare earth catalyst can be broadly divided into a variety of non-halogenated rare earth compounds with aluminum alkyl and halogen-containing Lewis acid