Syndiotactic-specific polymerization of styrene: catalyst structure and polymerization mechanism

被引：74

作者：

Pellecchia, C ^{[1
]}

Grassi, A ^{[1
]}

机构：

[1] Univ Salerno, Dipartimento Chim, I-84081 Baronissi, SA, Italy

来源：

TOPICS IN CATALYSIS | 1999年 / 7卷 / 1-4期

关键词：

syndiotactic; polystyrene; Ziegler-Natta; catalysts;

D O I：

10.1023/A:1019120002102

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The mechanistic investigation of syndiotactic-specific polymerization of styrene is reviewed, mainly with reference to the research work carried out at the University of Salerno. NMR analysis of the stereochemical structure of s-PS macromolecules, in some cases suitably labelled, provided valuable information concerning the regiochemistry of polyinsertion, the type of addition to the monomer double bond, and the model of stereospecific propagation. Kinetic studies and spectroscopic investigation of the catalytic systems suggested a cationic Ti(III) complex with a strongly pi-co-ordinated benzyl-type growing chain as the true active species.

引用

页码：125 / 132

页数：8