胆甾相液晶与向列相液晶共聚物的制备及液晶性能的研究  

Preparation and Research of Liquid Crystal Performance of Cholesteric Phase Liquid Crystal and Nematic Phase Liquid Copolymer

作　　者：朱月[1] 谷盼盼 徐新宇[1,2] 周莉[1] 

机构地区：[1]辽宁石油化工大学化学与材料科学学院,辽宁抚顺113001 [2]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《当代化工》2014年第10期1943-1946,1949,共5页Contemporary Chemical Industry

基　　金：国家自然科学基金;项目号:51273035

摘　　要：合成了向列相液晶单体4-乙氧基苯甲酸-4’-烯丙氧基联苯酯(M1)和胆甾相液晶分子4-(4-烯丙氧基苯丙酰氧基)-苯基苯氧羰基戊酸胆甾醇酯(M2),把液晶分子根据不同的浓度配比分别和聚甲基含氢硅氧烷接枝共聚,合成了具有不同化学结构和性能的侧链型液晶聚合物。并利用红外光谱(FT-IR)、热失重分析(TGA)、差示量热扫描分析(DSC)、偏光显微法(POM)和旋光仪等测试手段对其迚行了表征。结果表明:随着单体M2含量的增加,聚合物的比旋光度随之增加;熔融温度和清亮点随M2含量的增加而降低;偏光照片显示P1为典型的向列相液晶;M2液晶分子引入后,P2-P7为典型的胆甾型液晶。In this paper , nematic liquid crystal monomer 4-allyloxy-biphenyl-4-ethoxybenzonate （M1）and cholesteric phase liquid crystal monomer 4-（4-allyloxy-phenyl-propionyloxy）hydroxyl biphenyl）cholesteryladipate （M2） were synthesized,mesogenic monomers were grafted to linear polymethyl hydrogensiloxanes, So two kinds of SLCPs with different chemical structures and characters were synthesized.The products were characterized by FT-IR、DSC、TGA、POM and polarimete et al. The results show that,with the increase of M2monomer,the specific rotation of polymer also increases; the clearing point of the liquid crystal and the melt temperature of the polymer increase with the decrease of the content of M2; POM show that P1is a typical nematic liquid crystal;after M2was added in the system, P2-P7were typical cholesteric liquid crystal.

关 键 词：向列相 胆甾相 液晶聚合物 液晶性 

分 类 号：O632.52[理学—高分子化学]