端基含环氧基团的液晶化合物的合成与表征  

Synthesis and characterization of liquid crystals compounds containing epoxy groups

作　　者：孙茹悦 谢建强 李雪 SUN Ruyue;XIE Jianqiang;LI Xue(Department of Materials Science and Engineering, North China of Science and Technology, Tangshan 063210, China;Key Laboratory of Functional Polymer Materials, Tangshan 063210, China)

机构地区：[1]华北理工大学材料科学与工程学院,河北唐山063210 [2]唐山市功能高分子材料重点实验室,河北唐山063210

出　　处：《功能材料》2018年第3期3197-3202,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51403050);河北省自然科学基金资助项目(E2015209274)

摘　　要：以对羟基苯甲酸甲酯为主要原料,通过酯化、醚化、水解等有机反应合成了3种端基含双键的液晶单体(Ⅳm),并以间氯过氧苯甲酸作为氧化剂将双键氧化,得到了3种含环氧官能团的液晶化合物(Ⅴm)。通过红外光谱(FT-IR)、核磁共振(NMR)对液晶单体的分子结构进行表征,采用差热扫描量热仪(DSC)和热台偏光显微镜(POM)测定其液晶相态。结果表明,所有目标产物分子结构正确,在一定条件下有液晶性能,且为互变型热致液晶。Three kinds of end group with double bonds(Ⅳm)were synthesized by esterification reaction,etherification reaction and hydrolysis reaction,using methyl4-hydroxybenzoate as the main raw material.And the double bonds were oxidized by3-chloroperoxybenzoic acid as an oxidizing agent to get three kinds of epoxy-functional groups liquid crystal monomers(Ⅴm).The molecular structures of the liquid crystal monomers were characterized by Fourier infrared absorption spectrometer(FT-IR)and proton nuclear magnetic resonance(NMR)spectroscopy,and the target product was identified.The performance of the product was characterized by differential scanning calorimetry(DSC)and thermal polarizing microscope(POM).The results shows that all the products were with the correct molecular structure and had liquid crystal properties under certain conditions with enantiotropic nematic mesophase.

关 键 词：液晶 液晶性能 互变 环氧官能团 对羟基苯甲酸甲酯 

分 类 号：O631[理学—高分子化学]