含磺酸离子的侧链液晶聚硅氧烷的合成与表征

Synthesis and Characterization of Side-Chain Liquid Crystalline Polysiloxanes Containing Sulfonic Acid Ionic Groups

液晶单体M1(4-烯丙氧基苯甲酰氧基-4′-甲氧基苯甲酰氧基联苯),M2(4-烯丙氧基苯甲酰氧基-4′-丁基苯甲酰氧基苯)和离子单体M3(4-烯丙氧基偶氮苯磺酸)与含氢聚硅氧烷进行共聚合反应,制备了含磺酸离子的侧链液晶聚硅氧烷·其结构和液晶性能通过红外光谱(IR),差示扫描量热法(DSC)、偏光显微分析法(POM)、热重分析法(TG)进行了表征·研究结果表明,离子基团的引入,降低了液晶性能,但是没有改变其液晶类型·

A series of side-chain liquid crystalline polysiloxanes containing sulfonate acid ionic groups were synthesized via copolymerization reaction of liquid crystalline monomers M_1(4-allyoxybenzoyloxy-4′-methyloxybenzoyloxy-p-bi phenyl), M_2 (4-allyoxybenzoyloxy-4′-buthylbenzoyloxy-p-phenyl) and ionic monomer M_3 (4-[4-(2-propenyloxy) phenyl] azo) benzenesulfonic acid) with polymethylhydrosiloxane, and their structures and properties were characterized by FTIR, DSC, POM and TG. The results showed that introducing ionic groups in the liquid crystal will weaken the mesomorphic properties of relevant polymer in which no ionic groups contained, but not change the type of liquid crystal phase.