Ethylene polymerization catalyzed by rare earth calixarene catalytic system

被引：26

作者：

Chen, YF

Zhang, YF

Shen, ZQ ^{[1
]}

Kou, RQ

Chen, LS

机构：

[1] Zhejiang Univ, Dept Polymer Sci & Engn, Hangzhou 310027, Peoples R China

[2] Zhejiang Univ, Cent Lab, Hangzhou 310027, Peoples R China

来源：

EUROPEAN POLYMER JOURNAL | 2001年 / 37卷 / 06期

基金：

中国国家自然科学基金;

关键词：

rare earth; calixarene complex; ethylene polymerization;

D O I：

10.1016/S0014-3057(00)00248-2

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Eleven calixarene rare earth complexes were prepared by alcohol-phenol exchange reaction of rare earth isopropoxides with calixarenes in toluene. These rare earth calixarene complexes combined with Al(iBu)(3) were found for the first time to be effective homogeneous catalysts to polymerize ethylene. The effects of Al/Nd molar ratio and reaction temperature on the polymerization were investigated. The catalytic activity of calix[6]arene neodymium system is 39.5 kg PE/mol Nd h giving polyethylene with viscosity average molecular weight of 93.1 x 10(4) under the following conditions: [Nd] = 1 x 10(-3) mol/l(-1), Al/Nd = 15, T = 80 degreesC, time = 0.5 h, ethylene pressure = 1.2 MPa. AlBu2H, AlEt3 can be used instead of Al(iBu)3 to form effective catalyst with calix[6]arene neodymium for ethylene polymerization. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：1181 / 1184

页数：4

共 12 条

[1] CALIXARENES, MACROCYCLES WITH (ALMOST) UNLIMITED POSSIBILITIES [J].