Synthesis and properties of liquid crystalline polyurethanes from 4,4-bis (6-hydroxyhexoxy) biphenyl and 3,3-dimethyl-4, 4-biphenylene diisocyanate

摘要：

A thermotropic liquid crystalline polyurethane (LCPU) was synthesized by the polyaddition reaction of 3,3-dimethyl-4,4biphenylene diisocyanate (TODI) with 4,4-bis(6-hydroxyhexoxy)biphenyl (BHHBP). The liquid crystalline behavior of the polymer was investigated by differential scanning calorimetry (DSC), polarized optical microscopy (POM), wide angle X-ray diffraction (WAXD). The LCPU exhibited a nematic phase with a threaded texture and had a wide mesophase temperature range. And thermogravimetric analysis (TGA) indicated the decomposition temperature of the LCPU was ＞300℃. The observation of POM showed that the LCPU was a thermotropic nematic liquid crystalline polymer at certain temperature range.

关键词： Liquid crystalline polyurethane Nematic phase Thermotropic nematic liquid crystalline Structure-property relations

作者: Xiao-Dong Chen Nan-Qiao Zhou Hai Zhang

作者单位: National Engineering Research Center of Novel Equipment for Polymer Processing, South China Universi National Engineering Research Center of Novel Equipment for Polymer Processing, South China Universi GuangZhou SCUT Bestry Technology Joint-stock Co., Ltd., South China University of Technology,Guangzh

会议类型: 国际会议

会议名称: 2009 International Symposium on Liquid Crystal Science and Technology(2009国际液晶科技研讨会)

会议地点: 昆明

会议语种:英文

页码: 144-149

在线出版日期: 2009-08-02（万方平台首次上网日期，不代表论文的发表时间）