新型非对称二醚给电子体丙烯聚合催化剂研究  

Studies on Catalyst Containing Novel Asymmetric Diether forPropene Polymerization

作　　者：徐德民[1] 马志[1] 宓霞[1] 柯毓才[1] 胡友良[1] 吴春红 

机构地区：[1]中国科学院化学研究所分子科学中心工程塑料国家重点实验室,北京100080 [2]燕山石油化工研究院分析中心,北京102500

出　　处：《高等学校化学学报》2002年第5期982-984,共3页Chemical Journal of Chinese Universities

基　　金：国家重点基础研究发展规划项目(批准号:G 1999064800)资助.

摘　　要：1,3-丙二醚类化合物为给电子体合成的新一类复相Ziegler-Natta催化剂(Z-N催化剂), 其用于丙烯聚合时,在无需外加给电子体的情况下, 可得到高活性的催化剂和高等规度的聚丙烯, 催化剂的活性是以邻苯二甲酸二丁酯为内给电子体合成的Z-N催化剂的2～3倍, 且得到聚丙烯的等规度大于95%[1～4]. 由于1,3-丙二醚类化合物与载体的配位作用较强, 不易与AlR3反应, 因此在丙烯聚合时无需外给电子体, 并能降低反应体系的复杂性, 有利于研究活性中心结构和聚合机理[5～7].Abstract MgCl2 supported Ziegler-Natta catalyst containing a novel asymmetric diether as internal donor was prepared for polymerization of propene. The effects of polymerization temperature and the n(Al)/ n(Ti) ratio on the catalytic activity and the molecular weight, the isotacticity and the melting point of polypropene were investigated. In comparison with the symmetric diether catalysts, the catalytic activity and the isotacticity of polypropene were much lower. The stereosequence distributions were analyzed by means of 13C NMR and the results obtained indicate that isotactic, syndiotactic and iso-syndiotactic block polypropenes were produced. The stereo effect of MBF and the polymerization mechanism were discussed.

关 键 词：非对称二醚 给电子体 丙烯 聚合 ZIEGLER-NATTA催化剂 聚丙烯 

分 类 号：O632.12[理学—高分子化学] O643.36[理学—化学]