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比较茂基三苄氧基钛［ＣｐＴｉ（ＯＢｚ）３］／ＭＡＯ和五甲基茂基三苄氧基钛［Ｃｐ＊Ｔｉ（ＯＢｚ）３］／ＭＡＯ两种均相催化体系的苯乙烯间规聚合；发现由于Ｃｐ＊Ｔｉ（ＯＢｚ）３主配体茂基上取代甲基的供电子效应，Ｃｐ＊Ｔｉ（ＯＢｚ）３／ＭＡＯ催化体系有较强的热稳定性和较高的催化活性，在较高的温度下（７０℃）仍然能够合成粘均相对分子质量高达３．０×１０５的间规聚苯乙烯（ｓＰＳ）；研究了聚合温度、催化剂浓度和苯乙烯浓度对Ｃｐ＊Ｔｉ（ＯＢｚ）３／ＭＡＯ体系催化苯乙烯间规聚合的影响，最佳聚合条件为：聚合温度７０℃、催化剂浓度１．０４×１０－４ｍｏｌ／Ｌ、ｍ（Ａｌ）／ｍ（Ｔｉ）为８３０、ｃ（苯乙烯）＞４．３２ｍｏｌ／Ｌ．聚合反应产物用沸丁酮抽提８ｈ，不溶部分ｓＰＳ用ＧＰＣ，１３ＣＮＭＲ，ＦＴＩＲ，ＷＡＸＤ和ＤＳＣ等方法进行表征．
The syndiotactic polymerization of styrene in the two homogeneous catalysis systems of CpTi (OBz) 3] / MAO and Cp * Ti (OBz) 3] / MAO was compared. It is found that the Cp * Ti (OBz) 3 / MAO catalyst system has strong thermal stability and high catalytic activity due to the electron-donating effect of the substituted methyl group on the Cp * Ti (OBz) 3 main ligand, (70 ℃) can still synthesize syndiotactic polystyrene (sPS) with viscosity average molecular weight up to 3.0 × 105. The effect of polymerization temperature, catalyst concentration and styrene concentration on the mechanical properties of Cp * Ti (OBz) 3 / MAO system for the syndiotactic polymerization of styrene. The optimum polymerization conditions were as follows: polymerization temperature 70 ℃, catalyst concentration 1.04 × 10-4mol / L, m (Al) / m Ethylene)> 4.32 mol / L. The polymerization product was extracted with butanone for 8h. The insoluble sPS was characterized by GPC, 13CNMR, FTIR, WAXD and DSC.