Synthesis of a novel organic-solvent-soluble polyimide and its application to alignment film for liquid crystal displays

We have synthesized a novel organic-solvent-soluble polyimide to be used as alignment films for liquid crystal displays. The polyimide has an aliphatic structure and can be cured at temperatures below 200° C. The novel polyimide also shows better alignment properties judging from its birefringence a...

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Bibliographic Details
Published inJapanese Journal of Applied Physics Vol. 33; no. 6A; pp. L810 - L812
Main Authors NISHIKAWA, M, YOKOYAMA, Y, BESSHO, N, SEO, D.-S, IIMURA, Y, KOBAYASHI, S
Format Journal Article
LanguageEnglish
Published Tokyo Japanese journal of applied physics 1994
Subjects
Applied sciences
Display
Electronics
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Polymers with particular properties
Preparation, kinetics, thermodynamics, mechanism and catalysts
Polyimide
Alignment
Film
Preparation
Use
Birefringence
Soluble compound
Experimental study
Liquid crystals
Polyaddition
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Summary:We have synthesized a novel organic-solvent-soluble polyimide to be used as alignment films for liquid crystal displays. The polyimide has an aliphatic structure and can be cured at temperatures below 200° C. The novel polyimide also shows better alignment properties judging from its birefringence and dichroic ratio than conventional polyimides derived from the precursor polyamic acids. The alignment of a nematic liquid crystal on the novel polyimide shows a good texture without irregular liquid crystal domains.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.33.L810