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Evaluation of Liquid Crystalline Polymers with Hydrocarbon Main Chain as Shutter Materials

碳氢主链液晶聚合物作为快门材料的评价

基本信息

批准号：
07555595
负责人：
KAWAKAMI Yusuke
金额：
$ 0.77万
依托单位：
Japan Advanced Institute of Science and Technology, Hokuriku
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555595/
关键词：
Molecular Design Siloxane Liquid Crystalline Polymer Molecular Weight Matrix Polymer Sea and Island Structure Dispersion of Liquid Crystal Liquid Crystalline Optical Shutter ブレンドマトリックス相分離構造

项目摘要

The purpose of the research was to develop a liquid crystalline optical shutter by controlling the micro phase-separated structure of a polystirene type liquid crystalline polymer blended with a base polymer, namely polystirene, based on our finding that polystirene with siloxane spacer show liquid crystallinity.Kawakami established the synthetic method of monomers, and obtained polymers with controlled molecular weight and its distribution by anionic polymerization of monomers with various mesogenic groups connected through siloxane spacer. These polymers showed liquid crystallinity in wide temperature range. The relationship between the molecular weight and its distribution with the temperature range of liquid crystallinity and liquid crystalline phase was studied differential scanning calorimeter, thermal mechanical analysis, and optical polarization micrograph. The results were published in Polym.Bull.36,653 (1996). These polymers showed self-supporting property and are transparent against light with wide range of wave length. Estimation of these polymers as a reservoir for liquid crystals in the micro phase-separated sea and island domain in collaboration with Dr, Goto and Kashiwagi. The results on polydiene were published in Polym. J.28,513 (1996), and the results on the synthesis of siloxane compounds were published in Chem.Lett.107 (1995), 517 (1996).Goto also studied the development of orienting membrane for liquid crystalline materials, and published the results in New Materials, 7,18 (1996) and J S R Technical Review, 103,1 (1996).By this research, the purpose to develop and evaluate the liquid crystalline materials for optical shutters was attained. However, further study is needed to control the molecular weight and the structure of polymers to develop a realizable systems which can compete with actually existing system.

本研究的目的是通过控制聚苯乙烯型液晶聚合物与基础聚合物聚苯乙烯共混的微相分离结构来开发液晶光学快门。基于我们发现带有硅氧烷间隔基的聚苯乙烯具有液晶性。Kawakami建立了单体的合成方法，通过硅氧烷间隔基连接的具有各种介晶基团的单体的阴离子聚合获得具有可控分子量及其分布的聚合物。这些聚合物在很宽的温度范围内显示出液晶性。用差示扫描量热仪、热机械分析和偏光显微镜研究了分子量及其分布与液晶温度范围和液晶相的关系。结果发表在Polym.Bull.36，653（1996）中。这些聚合物显示出自支撑性质，并且对具有宽波长范围的光透明。与后藤博士和Kashiwagi博士合作，估计这些聚合物作为微相分离海洋和岛屿域中液晶的储层。关于聚二烯的结果发表在Polym上。后藤还研究了用于液晶材料的取向膜的开发，并将结果发表在New Materials，7，18（1996）和J S R Technical Review，103中，1（1996）。通过本研究，达到了开发和评价用于光闸的液晶材料的目的。然而，需要进一步的研究来控制聚合物的分子量和结构，以开发可实现的系统，可以与实际存在的系统竞争。