Synthesis and characterization of side-chain liquid crystalline polymers and oriented elastomers containing terminal perfluorocarbon chains
作者:Fan-Bao Meng、Xiao-Dong Zhang、Xiao-Zhi He、He Lu、Yue Ma、Hui-Li Han、Bao-Yan Zhang
DOI:10.1016/j.polymer.2011.09.002
日期:2011.10
Several novel chiral side-chain liquid crystalline (LC) polysiloxane resins containing epoxy groups and mesogenic components have been graft copolymerized by a one-step hydrosilylation reaction with poly(methylhydrogeno)siloxane, an epoxy monomer 2-(allyloxymethyl)oxirane, and chiral fluorinated liquid-crystalline monomers 4′-(4-(allyloxy)benzoyloxy)biphenyl-4-yl 6-(perfluorooctanoyloxy)hexahydrofuro[3
通过与聚(甲基氢)硅氧烷,环氧单体2-(烯丙氧基甲基)环氧乙烷的一步氢化硅烷化反应,将几种含有环氧基和介晶组分的新型手性侧链液晶(LC)聚硅氧烷树脂接枝共聚,并进行手性氟化液晶单体4'-(4-(烯丙氧基)苯甲酰氧基)联苯-4-基6-(全氟辛酰氧基)六氢呋喃[ 3,2-b ]呋喃-3-基己二酸酯和4'-(4-(十一月10 -烯酰氧基)苯甲酰氧基)联苯-4-基6-(全氟辛酰氧基)六氢呋喃[ 3,2-b]己基-3-呋喃基己酸酯。使用4,4'-二氨基二苯基甲烷在中间相状态下在磁场下固化合成的环氧树脂,以获得交联的取向弹性体。单体,树脂和液晶弹性体(LCE)的化学结构,LC特性和表面形态通过多种实验技术进行表征,例如FTIR,1 H NMR,EA,TGA,DSC,POM和X-射线测量。合成树脂和相应的取向弹性体的介晶性能受到末端全氟化碳链组分的有效影响。树脂显示手性向列相和手性近晶C相(小号C*),以及