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Citation: ZHANG Chun-Hu, YANG Zheng-Hu, DING Meng-Xian, WU Ai-Guo, LI Zhuang. The Surface Property and Morphology of the Polyimides Having Fluorinated Main Chains for Liquid Crystal Alignment[J]. Chinese Journal of Applied Chemistry, ;2001, 18(7): 544-547. shu

The Surface Property and Morphology of the Polyimides Having Fluorinated Main Chains for Liquid Crystal Alignment

1.
a State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Union Laboratory of Polymer Chemistry, Chinese Academy of Sciences and China Petro-Chemical Corporation, Changchun 130022;
2.
b Laboratory of Electroanalytical Chemistry, Chinese Academy of Sciences, Changchun

Received Date: 22 December 2000
Available Online: 1 April 2001
Fund Project: 国家自然科学基金重点资助项目(50033010) (50033010)

The liquid crystal alignment with higher pretilt angles was obtained from polyimide(PI) having fluorinated main chains.The contact angles of the PI films were found to be dependent on the fluorine content of the PI.The morphology of the rubbed PI surfaces with fluorinated and unfluorinated main chains for liquid crystal alignment was compared by observation with atomic force microscope(AFM).The results showed that the surface of the rubbed PI films have regular and narrow intervals, aligned along the rubbing direction.The fluorinated PI surfaces are superior to the unfluorinated PI surfaces in regularity.
- polyimide,
- fluorinated main chain,
- liquid crystal alignment,
- surface properties
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