THERMOREVERSIBLE SUPRAMOLECULAR NETWORKS WITH POLYMERIC PROPERTIES

被引：147

作者：

STPOURCAIN, CB ^{[1
]}

GRIFFIN, AC ^{[1
]}

机构：

[1] UNIV CAMBRIDGE,MELVILLE LAB POLYMER SYNTH,CAMBRIDGE CB2 3RA,ENGLAND

来源：

MACROMOLECULES | 1995年 / 28卷 / 12期

关键词：

D O I：

10.1021/ma00116a010

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Hydrogen bonding between carboxylic acids and pyridines can be used as a means of chain extension. However, the reversibility of hydrogen bond formation does not allow the chain-extended structure to be fixed, and a temperature-dependent chain length results. Complexation between a tetrapyridyl species and a diacid is shown to counteract the reversibility of the hydrogen bonding. These complexes form thermoreversible three-dimensional supramolecular networks which have properties typical of low molar mass materials at high temperatures but polymeric properties at low temperatures. The complexes exhibited a glass transition and could form fibers from the melt yet exhibited a low-viscosity isotropic liquid at elevated temperatures. Atypically, a complex incorporating a 2,2',6,6'-tetrasubstituted biphenyl moiety was found to be liquid crystalline.

引用

页码：4116 / 4121

页数：6

共 32 条

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