Morphology and crystallinity of nascent sPS in bulk polymerization with homogeneous metallocene catalyst

被引：4

作者：

Fan, R ^{[1
]}

Cao, K ^{[1
]}

Li, BF ^{[1
]}

Fan, H ^{[1
]}

Li, BG ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Chem & Biochem Engn, Polmer React Engn Branch, Hangzhou 310027, Peoples R China

来源：

EUROPEAN POLYMER JOURNAL | 2001年 / 37卷 / 11期

基金：

中国国家自然科学基金;

关键词：

styrene; syndiotactic polymerization; particle morphology; crystallization; metallocene catalysts;

D O I：

10.1016/S0014-3057(01)00108-2

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Powdery syndiotactic polystyrene (sPS) was synthesized in a bulk process with the homogeneous metallocene catalyst system, mono(eta (5)-pentamethylcyclopentadienyl) trichloride titanium/methylaluminoxane/triisobutyl aluminum. The morphology of the nascent polymer particles were investigated and an interesting splaying morphology was observed when the conversion ranged from 0.9% to 1.7%. The crystallinities of the as-polymerized polymer samples at different conversions were studied also. The experimental results suggested that manipulating the relative crystallizing rate to exceed the relative polymerizing rate in the initial stage of the polymerization is feasible to prepare the powder product. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：2335 / 2338

页数：4

共 8 条

[1] NEW FEATURES IN POLYMER CRYSTAL GROWTH FROM CONCENTRATED SOLUTIONS [J].