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关于α-TiCl_3-AIR_3或其他 Ziegler-Natta 催化剂对α-烯烃定向聚合的催化作用机理,近年来国际上进行了大量的研究工作,提出了许多理论.根据 Cossee 的看法,催化剂的活性中心可能是α-TiCl_3晶体表面上某些带有烷基而且和氯离子空位相瞵的钛离子.Cossee 的理论能解释大部份的实验事实,但 Cossee只考虑空间位阻因素,而未考虑这种夹层型晶体氯离子格点上极化电场对吸附在活性点上的α-烯烃的定
In recent years, a great deal of research work has been done in the world on the mechanism of α-TiCl 3 -IRA 3 or other Ziegler-Natta catalysts for the directional polymerization of α-olefins. Many theories have been proposed. According to Cossee, the active sites of catalysts may be Some titanium ions on the surface of α-TiCl_3 with alkyl groups and vacancies in the chloride ion can be explained by Cossee’s theory, but Cossee considers only the steric hindrance and does not consider this interlayer Crystalline chloride ion lattice points on the polarized electric field adsorption on the active site α-olefin fixed