液晶偶氮聚芳酯的合成及性能  

Synthesis and Properties of Liquid-Crystal Azo-Polyesters

作　　者：邱明艳[1] 张楠[1] 牛永生[1] 郑勇[1] 卫爱民[1] 石蔚云[1] 

机构地区：[1]安阳工学院化学与环境工程学院,河南安阳455000

出　　处：《高分子材料科学与工程》2015年第9期53-57,共5页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(21406002);安阳工学院院基金(YJJ2013012)

摘　　要：以四丁基溴化铵为相转移催化剂,采用2,2′-二甲基-偶氮苯-4,4′-二甲酰氯与二羟基二苯砜界面缩聚,合成2种新型的偶氮聚芳酯(azo-PSR)。通过红外光谱对聚合物结构进行表征,经热失重、差示扫描量热、紫外可见、偏光显微等分析手段对聚合物的溶解性能、耐热性能、光致变色性能、溶致液晶性能进行了测试。实验结果表明,azo-PSR在常温条件下可溶于常见的有机溶剂;聚合物具有高的特性黏度,最高可达1.20dL/g;其玻璃转化温度Tg及热分解温度(T5%)分别为202.2℃,345.9℃(azo-PSR1)和189.5℃,345.9℃(azo-PSR2);聚合物在N,N-二甲基乙酰胺(DMAc)中可产生溶致液晶态并具有光致变色性能。With prepared through tetrabutylammonium bromide as phase transfer catalyst, two novel azo-polyesters （azo-PSR） were interfacial poly-condensation of 2, 2＇-dimethylazobenzene-3, 3＇-dicarboxylic acid chloride with dihydroxydiphenyl sulfones. Their molecular structures were identified by Fourier transform infrared spectroscopy （FT-IR）. The azo-PSR exhibits good solubility, high inherent viscosity （reaches 1.20 dL/g）. The Tg values and T5% mass loss temperature are 202.2 ℃, 345.9℃ （azo-PSR1） and 189.5 ℃, 345.9℃ （azo-PSR2）, respectively. The lyotropic liquid crystalline and photoisomerization properties were observed for the polymers dissolved in N, N-dimethylacetamide （DMAc） by a polarizing optical microscope and an ultraviolet-visible spectrophotometer with 365 nm ultraviolet irradiation.

关 键 词：偶氮聚芳酯 液晶性 溶解性 热稳定性 光致变色 

分 类 号：TQ316.43[化学工程—高聚物工业]