液晶与显示Issue(5)：757-762,6.DOI:10.3788/YJYXS20153005.0757
聚酰亚胺主链结构对液晶取向膜性能的影响
Properties of polyimide liquid crystal alignment layer with different backbone structure
摘要
Abstract
A series polyimides (PIs)were prepared by one-step method.These PIs were comprised of a functional diamine N,N-bis (4-aminophenyl )-4-(dodecylo-xy-biphenyl )-4′-amino-phenylether (C1 2 -BAAPE),one of two commercially available diamines 2,2′-Bis(trifluoromethy-l)-4,4′-diaminobiphe-nyl (TFDB),4,4′-Oxydianiline (ODA)and one of two dianhydride 4,4′-(hexafluoroisopropylidene) diphthalic anhydride (6FDA)and 4,4′-Oxydiphthalic anhydride (ODPA)in order to get different backbone structures.The structures and thermo properties of these PIs were characterized by NMR, FT-IR,DSC and TGA.Pretilt angles and alignment abilities were carried out by pretilt angle tester and polarization microscope.Solubility of PIs was tested by dissolving PIs in various organic solvents. DSC and TGA curves showed that PI-2 had higher glass transition temperature (T g )and decomposi-tion temperature (T d )than PI-1 and PI-3.Three PI films presented vertical alignment before mechan-ical rubbing and only PI-2 maintained it after rubbing process.Conformations of these PIs were simu-lated by Material Studio (MS).The vertical conformation existed in PI-2 ’s backbones improved rubbing resistance and showed vertical alignment ability after rubbing.关键词
聚酰亚胺/主链结构/液晶取向膜/垂直取向/耐摩擦性能Key words
polyimide/backbone structure/LC alignment layer/vertical alignment/rubbing resistance分类
化学化工引用本文复制引用
刘露露,刘明,龚世铭,汪映寒..聚酰亚胺主链结构对液晶取向膜性能的影响[J].液晶与显示,2015,(5):757-762,6.基金项目
国家自然科学基金(No．51173115) （No．51173115）
博士点基金(No．20110181110030) （No．20110181110030）
