侧链聚硅氧烷液晶高分子的合成与表征及应用研究  

SYNTHESIS AND CHARACTERIZATION OF SIDE-CHAIN LIQUID CRYSTAL POLYSILOXANES AND STUDIES ON THEIR APPLICATION

作　　者：朱鸣岗[1] 张其震[1] 侯昭升[1] 唐新德[1] 李桂英[1] 

机构地区：[1]山东大学化学与化工学院

出　　处：《高分子学报》2003年第2期298-301,共4页Acta Polymerica Sinica

基　　金：国家自然科学基金资助项目 (基金号 2 98740 2 0和 5 95 73 0 2 9)

摘　　要：Two liquid crystal monomers,cholesteryl 10\|undecylenate (M1), and cholesteryl 4\|(10\|undecylenoyloxy)\|benzoate(M2),and their respective side\|chain liquid crystal homopolymers (P1,P2) were synthesized.Their liquid crystal properties were characterized by POM and DSC method.M1 could form sematic liquid crystal and cholesteric liquid crystal,while M2\|only cholesteric liquid crystal.The Polymers,P1 and P2,exhibited sematic liquid crystal behavior.The results also indicated that,because of the structure of 1,4\|COO\|Ar\|COO\|in M2 and P2,the isotropization tempretures of the liquid crystalline M2 and P2 were higher than those of M1 and P1,respectively,and the temprature range of LC phases of M2 was also wider than that of M1.Homopolymer P1,was applied in the capillary column gas chromatography as a novel stationary phase and showed ideal separating selectivity.A mixture of anthracene,phenanthrene and acenaphene and a mixture of dichlorobenzene isomers were well separated.Two liquid crystal monomers,cholesteryl 10\|undecylenate (M1), and cholesteryl 4\|(10\|undecylenoyloxy)\|benzoate(M2),and their respective side\|chain liquid crystal homopolymers (P1,P2) were synthesized.Their liquid crystal properties were characterized by POM and DSC method.M1 could form sematic liquid crystal and cholesteric liquid crystal,while M2\|only cholesteric liquid crystal.The Polymers,P1 and P2,exhibited sematic liquid crystal behavior.The results also indicated that,because of the structure of 1,4\|COO\|Ar\|COO\|in M2 and P2,the isotropization tempretures of the liquid crystalline M2 and P2 were higher than those of M1 and P1,respectively,and the temprature range of LC phases of M2 was also wider than that of M1.Homopolymer P1,was applied in the capillary column gas chromatography as a novel stationary phase and showed ideal separating selectivity.A mixture of anthracene,phenanthrene and acenaphene and a mixture of dichlorobenzene isomers were well separated.

关 键 词：侧链聚硅氧烷 液晶高分子 合成 表征 应用 热致液晶 近晶相 胆甾相 气相色谱 

分 类 号：O753[理学—晶体学]