溶液法液晶离聚物的制备及表征  

Synthesis and characterization of liquid crystalline ionomer by solution polycondensation

作　　者：夏英[1] 王爽[1] 马南[1] 李晓峰[1] 邓亚男[1] 

机构地区：[1]大连工业大学纺织与材料工程学院,辽宁省大连市116034

出　　处：《合成树脂及塑料》2014年第2期25-28,共4页China Synthetic Resin and Plastics

基　　金：大连市科技攻关项目(2012A17GX130)

摘　　要：以对苯二酚、复合二元酰氯、4-羟基萘偶氮对苯磺酸钠为反应基元,采用溶液缩聚法合成液晶离聚物(LCI)。用红外光谱仪、偏光显微镜、广角X射线衍射仪及热重分析仪对产物进行了分析,结果表明:在波数为1213,1017cm-1处出现了磺酸基团的特征峰,说明离子基团已成功引入到液晶聚合物中,合成了目标产物;LCI的熔点为197℃,相对分子质量为5607,具有热致液晶性,液晶织构为向列型,其清亮点高于分解温度,具有较宽的液晶态温度范围;LCI具有良好的热稳定性,初始分解温度可达296℃,热失重速率仅为0.71%/℃。A novel kind of liquid crystalline ionomer （LCI） was synthesized by solution polycon-densation with hydroquinone, dual chloride of acid compound, 4-（4-hydroxy-1-naphthylazo）benzene sulfonic acid sodium as units of participation in the reaction. The LCI was analyzed by Fourier trans-form infrared spectroscopy （FTIR）, polarized light microscopy （PLM）, wide angle X-ray diffraction （WAXD） and thermogravimetry （TG）. The results show that characteristic peaks at 1 213, 1 017 cm-1 demonstrate the sulfonic acid ionic groups has been successfully introduced into the liquid crystal polymer and the target product is prepared. The LCI has melting point of 197 ℃ and relative molecular mass of 5 607. The LCI is a thermotropic liquid crystal with nematic liquid crystal texture. The clearing temperature of the LCI is higher than its decomposition temperature, indicating that the LCI maintains liquid crystal state at a wide range of temperatures. The LCI has excellent thermal stability with the initial decomposition temperature up to 296 ℃ and thermal mass loss rate only 0.71%/℃.

关 键 词：液晶离聚物 溶液缩聚 磺酸基团 

分 类 号：TQ316.3[化学工程—高聚物工业] O631.3[理学—高分子化学]