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含有两种介晶基元的侧链聚硅氧烷类液晶的热性能
引用本文:丛越华,孙彩兰,张宝砚,王文彬.含有两种介晶基元的侧链聚硅氧烷类液晶的热性能[J].液晶与显示,2001,16(1):11-15.
作者姓名:丛越华  孙彩兰  张宝砚  王文彬
作者单位:1. 东北大学 化学系,
2. 抚顺技术职业学院,
基金项目:国家自然科学基金资助(29874007)
摘    要:将两种液晶体4-联苯二酚基-4′-(2-乙基已酰基)-4-烯丙氧基苯甲酸酯(M1)和4-烯丙氧基苯甲酰氧基-4′-甲氧基苯(M2)接枝到聚硅氧烷链上,用IRS、DSC、TGA、POM、SAXS和WAXD等对所得样品进行了测定。结果表明,含有两种介晶基元的聚硅氧烷类液晶,具有较宽的中介区间(240-255℃),比只含有一种介晶基元的聚硅氧烷类液晶中介相拓宽约170℃左右,且低于室温具有液晶相(-18-8.7℃),热分解温度在300℃以上,属于近晶结构。

关 键 词:介晶基元  聚硅氧烷  热性能  液晶  聚合物  相变
文章编号:1007-2780(2001)01-0011-05
修稿时间:2000年8月17日

Thermal Properties of Side-chain Liquid Crystalline Polymethylsiloxane Containing Two Mesogenic Units
CONG Yue-hua, SUN Cai-lan, ZHANG Bao-yan, WANG Wen-bin.Thermal Properties of Side-chain Liquid Crystalline Polymethylsiloxane Containing Two Mesogenic Units[J].Chinese Journal of Liquid Crystals and Displays,2001,16(1):11-15.
Authors:CONG Yue-hua  SUN Cai-lan  ZHANG Bao-yan  WANG Wen-bin
Abstract:A series of side-chain liquid crystalline polymethylsiloxanepolymers containing different mole ratio of mesogenic monomers 4-(4-allyloxybenzoxy)-4′-(2-ethyl-hexanoyloxy) diphenyl (M1) and 4-allyloxybenzoxy-4′-methoxybenzene (M2) were prepared by graft polymerization. The structure and properties of the ploymers were characterized by IRS, POM, SAXS, WAXD, DSC and TGA. All of the samples PⅠ-PⅤ exhibited over a broad temperature range of liquid crystals (240~255℃), the temperature of mesogenic range increased about 170℃ comparing the polymers only containing M1 or M2. The Tg of P0-PⅦ were lower than room temperature (from-18℃ to 8.7℃), the temperatures of decomposion were higher than 300℃. All of the samples were smectic mesogenic textures.
Keywords:mesogenic units  polymethylhydrosiloxane  thermal properties
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