硫醇-烯点击化学反应制备主链液晶弹性体  

Main Chain Liquid Crystalline Elastomers via Thiol-ene Click Chemical Reaction

作　　者：杨向勇 陈权[1] 张再兴 GRIFFIN Aneslm C YANG Xiang-yong;CHEN Quan;ZHANG Zai-xing;GRIFFIN Aneslm C(Chemical and Pharmaceutics Engineering College of Henan University of Science and Technology,Luoyang 471023,China;School of Chemistry and Materials Engineering,Huaihua University,Huaihua 418000,China;School of Materials Science and Engineering of Georgia Institute of Technology,Atlanta 30332-0295,America)

机构地区：[1]河南科技大学化工与制药学院,河南洛阳471023 [2]怀化学院化学与材料工程学院,湖南怀化418000 [3]佐治亚理工学院材料科学与工程学院,美国亚特兰大30332-0295

出　　处：《塑料工业》2020年第7期5-10,共6页China Plastics Industry

基　　金：河南省高等学校重点科研项目计划支持(17A430016);湖南省重点研发计划项目(2016GK2020);聚乙烯醇纤维材料制备技术湖南省工程实验室开放项目(HGY201607)。

摘　　要：以自制的含三个苯环液晶基元的二烯单体与1,6-己二硫醇(DMH)在254 nm紫外光辐照下,以2-羟基-2-甲基苯基丙烷-1-酮(HDMPh)为光引发剂,以季戊四醇四-3-巯基丙酸酯(PETMP)为交联剂,通过硫醇-烯点击化学反应,制备了主链液晶聚合物与液晶弹性体。差示扫描量热法(DSC)、偏光显微镜(PLM)、广角X衍射(WAXD)测试结果表明,该主链聚合物与弹性体具有一个液晶转变点和向列型液晶纹影织构。当反应体系中添加光引发剂时,主链型液晶及其弹性体分子量较高,成膜性好,力学性能好;而未添加光引发剂的反应体系,得到的聚合物分子量较低,成膜性差,力学性能差。Under the irradiation of 254 nm ultraviolet light,taking self-made diene monomer containing three benzene ring liquid crystalline monomers and 1,6-hexane dithiol(DMH) as raw materials,2-hydroxyl-2-methylphenylpropane-1-ketone(HDMPh) as photoinitiator and pentaerythritol tetra-3-mercaptopropionate as crosslinking agent,main chain liquid polymer and crystalline elastomers were prepared by thiol-ene click chemical reaction.It was characterized by differential scanning calorimetry(DSC),polarizing microscope(PLM) and wide-angle X-ray diffraction(WAXD).The results show that the main chain polymer and elastomer have a liquid crystal transition point and a nematic liquid schlieren texture.When the photoinitator is added into the reaction system,the main chain liquid polymer and elastomers have higher molecular weight,good film forming and mechanical properties.However,the reaction system without photoinitiator results in low molecular weight,poor film forming and mechanical properties.

关 键 词：硫醇-烯点击反应 液晶弹性体 织态结构 热性能 拉伸性能 

分 类 号：TQ334[化学工程—橡胶工业]