液晶与显示2011，Vol.26Issue(4)：437-442,6.DOI:10.3788/YJYXS20112604.0437
近晶A球粒织构聚硅氧烷侧链液晶的合成与液晶性能研究
Syhthesis and Mesomorphic Properties of Side-Chain Liquid-Crystalline Polysiloxanes Exhibiting Spherulite Texture of Polymeric Smectic A Phase
摘要
Abstract
A new type of side-chain liquid-crystalline polysiloxanes (SCLCPs) was synthesized by graft polymerization, using(trans,trans)-4-propyl-4'-vinyl-bicyclohexane(3HHV) with platelet texture of a blue phase as mesogenic monomer, and the production rate is 78%. The bicyclohexane structure and double bond of monomer and the hydrosilylation reaction in monomer and polymer were confirmed by characterizing the chemical structure of liquid crystal monomer and polymer by means of Fourier transform infrared spectroscopy and hydrogen-nuclear magnetic resonance spectra. Liquid crystal behavior of monomer and polymer were analyzed by differential scanning calorimetry, polarizing optical microscopy and X-ray diffraction. The mesophase temperature range of polymer was increased by 98. 4 °C comparing with the mesophase temperature range of monomer. Meanwhile, spherulite texture of polymeric smectic A phase of liquid crystal polymer was revealed in the cooling cycle by polarizing optical microscopy, and this texture was so uncommon that can hardly be found in the liquid crystalline polymers.关键词
聚硅氧烷/液晶聚合物/蓝相小板块织构/聚合物近晶A球粒织构Key words
polysiloxanes/ liquid crystalline polymers/ platelet texture of a blue phase/ polymeric smectic A spherulite texture引用本文复制引用
李颖,张广成,刘斌,蒋莹,孙伟民..近晶A球粒织构聚硅氧烷侧链液晶的合成与液晶性能研究[J].液晶与显示,2011,26(4):437-442,6.基金项目
陕西省教育厅科研计划基金资助项目(No.2010JK680) （No.2010JK680）
西安科技大学培育基金资助项目(No.200815) （No.200815）
