A novel study of the polymerisation process involved in the formation of the network component of polymer-stabilised liquid crystals within electro-optic cells using high performance liquid chromatography

被引：3

作者：

Brittin, M ^{[1
]}

Mitchell, GR ^{[1
]}

Gilbert, A ^{[1
]}

机构：

[1] Univ Reading, JJ Thomson Phys Lab, Ctr Polymer Sci, Reading RG6 6AF, Berks, England

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 2001年 / 357卷

基金：

英国工程与自然科学研究理事会;

关键词：

polymer-stabilised liquid crystals; high performance liquid chromatography; photopolymerisation; network formation;

D O I：

10.1080/10587250108028247

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Polymer-stabilised liquid crystals are systems in which a small amount of monomer is dissolved within a liquid crystalline host, and then polymerised in situ to produce a network. The progress of the polymerisation, performed within electro-optic cells, was studied by establishing an analytical method novel to these systems. Samples were prepared by photopolymerisation of the monomer under well-defined reaction conditions: subsequent immersion in acetone caused the host and any unreacted monomer to dissolve. High performance liquid chromatography was used to separate and detect the various solutes in the resulting solutions, enabling the amount of unreacted monomer for a given set of conditions to be quantified. Longer irradiations cause a decrease in the proportion of unreacted monomer since more network is formed, while a more uniform LC director alignment (achieved by decreasing the sample thickness) or a higher level of order (achieved by decreasing the polymerisation temperature) promotes faster reactions.

引用

页码：99 / 115

页数：17