Synthesis of syndiotactic polystyrene/atactic polypropene block copolymer in the presnece of half-sandwich titanocene catalysts

被引：0

作者：

Zhu, FM ^{[1
]}

Wu, Q ^{[1
]}

Fang, YT ^{[1
]}

Huang, QF ^{[1
]}

Lin, SA ^{[1
]}

机构：

[1] Zhongshan Univ, Inst Polymer Sci, Guangzhou 510275, Peoples R China

来源：

CHEMICAL RESEARCH IN CHINESE UNIVERSITIES | 2000年 / 16卷 / 01期

关键词：

metallocene catalyst; syndiotactic polystyrene; atactic polypropene; styrene and preopene coploymerization;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Some highly active eta(5)-pentamethylcyclopentadienyltribenzyloxy titanium complexes [Cp*Ti(OBz)(3)] activated by modified methylaluminoxane (mMAO) were prepared and used as the catalyst for styrene syndiospecific polymerization and propene atactic polymerization. Styrene could be copolymerized with propene when the propene was prepolymerized for a period, to which styrene and tri-isobutylaluminum (TIBA) were then added. The titled block copolymer together with the related homopolymers was obtained. The copolymerization products can be divided into the homopolymers and the copolymer by successive solvent extraction with boiling butanone, heptane and tetrahydrofuran (THF), and each fraction was characterized by C-13 NMR, DSC and WAXD. It was found that aPS and aPP were soluble in boiling butanone and heptane respectively. The block copolymer (sPS-b-aPP) composed of syndiotactic polystyrene segment was soluble in boiling THF and the residue was chiefly sPS.

引用

页码：83 / 89

页数：7

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