含手性基元的侧链液晶聚合物的合成与性能表征  

Synthesis and Characterization of Side-Chain Liquid Crystalline Polymers Containing Chiral Agent

作　　者：何晓智[1] 周群华 赵静[1] 田梅[1] 张宝砚[1] 

机构地区：[1]东北大学分子科学与工程中心,辽宁沈阳110004 [2]郑州澍青医学高等专科学校,河南郑州450064

出　　处：《高分子材料科学与工程》2011年第9期25-27,32,共4页Polymer Materials Science & Engineering

基　　金：东北大学基本科研业务费(N090405005)

摘　　要：文中设计与合成了国内未见报道的单体M1、M2和系列手性液晶聚合物。通过差示扫描量热（DSC）、偏光显微分析（POM）、广角X射线衍射、旋光仪等测试手段研究了单体M1和手性液晶聚合物液晶性能。结果表明,M1为向列型液晶单体,M2为手性非液晶单体。聚合物P2-P4呈现近晶A相,P5,P6为胆甾相,P7的液晶性能已不明显,聚合物P8已没有液晶性能。具有宽的液晶相范围,液晶相范围均高于140℃。随着手性单体M2含量（0%-50%）的增加,聚合物的玻璃化转变温度、清亮点温度、液晶相范围均呈现降低趋势。Monomers： nematic monomer M1 and chiral monomer M2 were synthesized and a series of polymers were prepared by graft polymerization of M1 and M2 using polymethylhydrosiloxane as backbone.The mesomorphic properties were investigated by differential scanning calorimetry（DSC）,polarizing optical microscopy（POM） and X-ray diffraction measurements（XRD）.Polymer P2～P4 show chiral smectic phase,P5,P6 shows cholesteric phase,P7 exhibits bad properties,P8 doesn′t have a liquid crystal phase.The range of the mesogenic phase is more than 140 ℃.As the concentration of chiral agent M2（0～50%）increasing,the glass transition temperatures,clearing points and the range of temperature of the polymer decrease.

关 键 词：手性 近晶相 玻璃化温度 聚合物 合成 

分 类 号：O631.1[理学—高分子化学]