HOMO- AND COPOLYMERIZATION OF ETHYLENE CATALYZED BY ANSA-METALLOCENES WITH DOUBLY HETERO-BRIDGES  

作　　者：闫卫东 王佰全 

机构地区：[1]Institute of Polymer Science and Engineering,Hebei University of Technology [2]The State Key Laboratory of Elemento-Organic Chemistry,Department of Chemistry,Nankai University

出　　处：《Chinese Journal of Polymer Science》2008年第4期415-423,共9页高分子科学（英文版）

基　　金：the National Natural Science Foundation of China(No.50573018)

摘　　要：Three ansa-metallocenes(Me_2C)(Me_2Si)Cp_2TiCl_2(1),[(CH_2)_5C](Me_2Si)Cp_2TiCl_2 (2)and (Me_2C)(Me_2Si)Cp_2ZrCl_2 (3)with larger dihedral angles and longer distance from metal to the center of Cp planes were synthesized and used as catalysts for ethylene polymerization in the presence of methylaluminoxane (MAO).In the case of ethylene polymerization,compared the feature structures of unbridged metallocenes, singly bridged metallocenes and doubly bridged metallocenes 1,2,3,there exhibit the relationship bet...Three ansa-metallocenes(Me_2C)(Me_2Si)Cp_2TiCl_2(1),[(CH_2)_5C](Me_2Si)Cp_2TiCl_2 (2)and (Me_2C)(Me_2Si)Cp_2ZrCl_2 (3)with larger dihedral angles and longer distance from metal to the center of Cp planes were synthesized and used as catalysts for ethylene polymerization in the presence of methylaluminoxane (MAO).In the case of ethylene polymerization,compared the feature structures of unbridged metallocenes, singly bridged metallocenes and doubly bridged metallocenes 1,2,3,there exhibit the relationship bet...

关 键 词：Ansa-metallocene catalyst Doubly hetero-bridged metallocene Polymerization ETHYLENE α-Olefins 

分 类 号：O631.5[理学—高分子化学]