Lewis acid-assisted anionic polymerization of methyl cyclobutene-1-carboxylate

被引：12

作者：

Kitayama, T

Kawauchi, T

Nakamura, M

Sufi, B

Padias, AB

Hall, HK

机构：

[1] Osaka Univ, Grad Sch Engn Sci, Dept Chem, Osaka 5608531, Japan

[2] Univ Arizona, Dept Chem, Tucson, AZ 85721 USA

来源：

POLYMER | 2004年 / 45卷 / 15期

基金：

美国国家科学基金会;

关键词：

living polymerization; monomer-selective copolymerization; thermal isomerization degradation;

D O I：

10.1016/j.polymer.2004.05.024

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A cyclobutene monomer, methyl cyclobutene-1-carboxylate (MHCB), has been polymerized by anionic addition polymerization. Although MHCB may be regarded as a member of alpha, beta-disubstituted acrylate derivatives which are reluctant to undergo anionic addition polymenzation. anionic polymerization of MHCB with tert-butyllithium (t-BuLi) in combination with bis(2,6-di-tert-butylphenoxy)ethyl-aluminum [EtA](ODBP)(2)] in toluene at -78degreesC gives a polymer consisting of 1,2-linked cyclobutane ring in the main chain with narrow molecular weight distribution. Copolymerization of MHCB and methyl methacrylate with t-BuLi[EtAl(ODBP)(2) proceeds in a monomerselective and living manner to form a block-like copolymer. Poly(MHCB) undergoes unique thermal reaction through ring opening of the cyclobutane units to form C = C bonds between successive monomer units. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：5085 / 5093

页数：9