文献类型：期刊文献

英文题名：Various silyl-substituted cyclopentadienyl titanium complexes [CpSi(CH₃)₂X]TiCl₃ as catalysts for syndiotactic polystyrene

作者：Sun, XQ; Xie, J; Zhang, H; Huang, JL

机构：[1]E China Univ Sci & Technol, Organomet Chem Lab, Shanghai 200237, Peoples R China

年份：2004

卷号：40

期号：8

起止页码：1903

外文期刊名：EUROPEAN POLYMER JOURNAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000223383400038)】；

语种：英文

外文关键词：half-sandwich titanocene; syndiotactic polystyrene; silyl-substituent

摘要：Three silyl-substituted titanium trichloride complexes [CpSi(CH3)(2)X]TiCl3 [X=Cl(I), Me(2), PhOMe(3)] were tested as catalyst precursors for the syndiospecific polymerization of styrene. The catalytic activity increased in the order 1 > 2 > 3. The highest activity was 2.42 x 10(7) g s-PS/mol Ti mol S h using complex 1/MAO catalytic system at molar ratio of Al/Ti = 2000. The effects of variation on polymerization temperature and Al/Ti ratio on the polymerization of styrene were also studied. (C) 2004 Elsevier Ltd. All rights reserved.