Large pretilt angle induced by an anhydride-terminal hyperbranched polyimide liquid crystal alignment layer

被引：16

作者：

Sun, Zhen ^{[1
]}

Qin, Ailin ^{[1
]}

Chen, Zihua ^{[1
]}

Wang, Yinghan ^{[1
]}

机构：

[1] Sichuan Univ, Coll Polymer Sci & Engn, State Key Lab Polymer Mat Engn China, Chengdu 610065, Sichuan, Peoples R China

来源：

LIQUID CRYSTALS | 2010年 / 37卷 / 03期

基金：

中国国家自然科学基金;

关键词：

polyimide; hyperbranched polyimide; pretilt angle; alignment layer; ORIENTATION; MOLECULES; POLYMERS;

D O I：

10.1080/02678290903564437

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Through the polycondensation of a four-functional amine with pyromellitic dianhydride, a hyperbranched polyimide (HPI) was synthesised in this study. The HPI was used for liquid crystal alignment layers. Wide angle X-ray diffraction measurement showed that the HPI film was amorphous. The morphology of the surface layer of film was determined by atomic force microscopy. It is novel that a larger pretilt angle, above 8 degrees, has been achieved with the rubbed HPI alignment layers. This result was different from that in a previous report, in which only a 2.8 degrees pretilt angle was induced by a HPI alignment film.

引用

页码：345 / 348

页数：4

共 18 条

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[2] SOLID SURFACE SHAPE AND ALIGNMENT OF AN ADJACENT NEMATIC LIQUID-CRYSTAL [J].