ESR study on SiO2-supported half-titanocene catalyst for syndiospecific polymerization of styrene

被引：22
|
作者：
Xu, JT
Zhao, J
Fan, ZQ
Feng, LX
机构：
[1] Dept. of Poly. Sci. and Engineering, Zhejiang University
来源：
MACROMOLECULAR RAPID COMMUNICATIONS | 1997年 / 18卷 / 09期
关键词：
D O I：
10.1002/marc.1997.030180916
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Monocyclopentadienyltitanium trichloride (CpTiCl3) was directly immobilized on silica surface. The resulting CpTiCl3/SiO2-MAO was investigated in view of its suitability for syndiospecific polymerization of styrene using ESR spectroscopy. Polymerization results show that both the syndiotacticity and the activity decrease upon immobilization. A possible explanation is that the active sites may become aspecific lifter immobilization and part of the immobilized active sites can be leached into the solution in the presence of MAO.
引用
收藏
页码：875 / 882
页数：8
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