80电影天堂网,少妇高潮一区二区三区99,jαpαnesehd熟女熟妇伦,无码人妻精品一区二区蜜桃网站

當前位置:群英聚首 > 論文著作 > 正文
Cellulose derivative-based cholesteric networks
來源:周雪松副研究員個人網(wǎng)站 發(fā)布日期:2009-01-06

Ethyl-cyanoethyl cellulose [(E-CE)C] /acrylic acid (AA) solution could form cholesteric networks when the AA was quickly photopolymerized. The cholesteric structure in the solution was changed during the polymerization but the variation of the cholesteric order could be depressed by crosslinking of the system. The dependence of lambda(max) for the cholesteric phase on both the crosslinker concentration and the polymerization temperature was studied by UV-Vis spectrometry. It was found that the cholesteric pitch variation is decreased with increasing the concentration of the crosslinking reagent and the water sensitivity of the cholesteric network is effectively suppressed and dependent on the types of crosslinker. The pitch of cholesteric network was decreased sharply with increasing the polymerization temperature, due to the increase of the volume shrinkage of the solvent during the polymerization.

Copyright © 2005 Polymer.cn All rights reserved
中國聚合物網(wǎng) 版權(quán)所有
經(jīng)營性網(wǎng)站備案信息

京公網(wǎng)安備11010502032929號

工商備案公示信息

京ICP證050801號

京ICP備12003651號