均相茂金属催化剂催化苯乙烯间规聚合中搅拌的作用  

Effects of Agitation on the Preparation of Syndiotactic Polystyrene with Homogeneous Metallocene Catalyst

作　　者：范荣[1] 李伯耿[1] 刘伟 曹堃[1] 冯连芳[1] 周文乐[2] 沈之刚 叶蒙 

机构地区：[1]浙江大学材料与化工学院聚合反应工程国家重点实验室,浙江杭州310027 [2]中石化上海石油化工研究院,上海201208

出　　处：《高校化学工程学报》2001年第5期429-433,共5页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金(No.29904006);国家重点基础研究发展规划项目(G1999064803)资助。

摘　　要：在不同搅拌型式的聚合反应器中使用均相茂金属催化剂(Cp*Ti(OR)3/MAO/TIBA)催化苯乙烯本体间规聚合。研究了搅拌桨型式、反应器以及搅拌速度对聚合物形态以及聚合过程的影响,并分析了搅拌、结晶和聚合之间的关系。研究表明,良好的搅拌剪切对避免凝胶、促进粉状间规聚苯乙烯的生成至关重要。聚合动力学的研究表明,搅拌转速不仅能影响聚合物的颗粒形态,也能通过改变聚合物原生晶的结晶速率从而影响聚合速率。The bulk syndiotactic polymerization of styrene catalyzed by homogeneous metallocene catalyst (Cp*Ti(OR)3/MAO/TIBA) was carried out in various reactors with different agitators. The effects of reactor type, agitator type, and agitating speed on polymer morphology and polymerization process were studied. The relationship among agitation, crystallization, and polymerization was analyzed. The experiment results show that good agitation is especially important to avoid the production of gel and promote the production of powdry sPS, and that the agitation speed may influence not only the powdery morphology, but also the polymerization rate through the crystallization rat of the nascent polymer crystal.

关 键 词：茂金属 催化聚合 间规聚苯乙烯 搅拌作用 催化剂 苯乙烯 动力学 结晶 形态 

分 类 号：O632.13[理学—高分子化学] O631.5[理学—化学]