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研究了茂基三正丙氧基钛［ＣｐＴｉ（ＯＰｒｎ）３］和改性甲基铝氧烷（ｍＭＡＯ）组成的新型单茂钛催化体系进行苯乙烯间规聚合反应动力学规律；在２２～５４ｍｏｌ·Ｌ－１浓度范围内，聚合反应速率对催化剂浓度和单体浓度都呈一级反应关系，表观活化能为３０３５ｋＪ·ｍｏｌ－１，碰撞因子为３１５×１０５ｍｏｌ－１·Ｌ·ｓ－１．推断出苯乙烯间规聚合反应机理，ＣｐＴｉ（ＯＰｒｎ）３和ｍＭＡＯ作用生成对苯乙烯间规聚合有更高活性的［ＣｐＴｉ（Ⅲ）（ＣＨ３）］δ＋…（ＯＰｒｎ）…［ＭＡＯ］δ－弱离子对活性中心；苯乙烯进行链增长反应时，与Ｔｉ配位的单体和增长链上的苯环大π键同时配位到Ｔｉ的２个空轨道上使得钛中心电子云密度增大而促进下一步的插入和链增长反应，并构成苯乙烯的间规聚合机制．
The kinetics of the syndiotactic polymerization of styrene with the novel monocene titanocene catalyst system consisting of CpTi (OPrn) 3 and modified methylaluminoxane (m-MAO) 2 ~ 5 4mol·L-1 concentration range, the polymerization rate of the catalyst concentration and monomer concentration showed a first-order reaction, the apparent activation energy of 30 35kJ · mol-1, the collision factor of 3 15 × 105 mol-1 · L · s-1. The mechanism of syndiotactic polymerization of styrene was deduced, and CpTi (OPrn) 3 and mMAO generated higher activity [CpTi (Ⅲ) (CH3)] δ + ... (OPrn) ... [MAO] δ-weak ion pair active center; styrene chain growth reaction, with the Ti-coordinated monomer and the benzene ring on the growth chain of large π bond to the two empty Ti orbitals make the titanium center electron cloud density Increase and promote the next step of insertion and chain growth reaction, and constitute a syndiotactic polymerization mechanism of styrene.