文献类型：期刊文献

英文题名：Effect of external electrical field on phase behavior and morphology development of polymer dispersed liquid crystal

作者：Yang, Dianzhi[1]; Lin, Jiaping[1]; Li, Tao[1]; Lin, Shaoliang[1]; Tian, Xiaohui[1]

机构：[1]E China Univ Sci & Technol, Dept Polymer Sci & Engn, Shanghai 200237, Peoples R China

年份：2004

卷号：40

期号：8

起止页码：1823

外文期刊名：EUROPEAN POLYMER JOURNAL

收录：;EI(收录号：2004298273841);WOS:【SCI-EXPANDED(收录号:WOS:000223383400028)】；

语种：英文

外文关键词：polymer dispersed liquid crystal (PDLC); phase behavior; electrical field; morphology; phase separation; liquid crystal ordering

摘要：Phase diagrams for mixtures of liquid crystal (LC)/monomer with and without an external electrical field applied have been established using polarized light microscope (PLM). The (isotropic + nematic) coexistent phase region and (isotropic + isotropic) phase boundary of LC/monomer mixtures were observed to shift upward to higher temperatures when the external electrical field exists. It was found that the electrical field applied during the cross-linking polymerization has a significant influence on the phase diagrams for the LC/polymer mixtures by rendering the coexistent phase regions shift upward to higher temperatures. The influence of the external electrical field on the processes of the isotropic-isotropic phase separation and liquid crystal ordering in PDLC formation has also been investigated. The results revealed that both the processes could be highly accelerated by the electrical field. (C) 2004 Elsevier Ltd. All rights reserved.