Diamine compounds, polyimides, and liquid crystal display panels

Abstract

The application provides a kind of diamine compound, polyimide and liquid crystal display panel.The diamine compound has the molecular structure represented by the following formula (1): wherein, R1 and R2 are respectively selected from the alkylene group with carbon number of 1-5.The diamine compound of the application contains diphenyl acetylene group capable of polymerization to form dimer structure, the dimer structure of diphenyl acetylene group has anchoring effect on liquid crystal, and because the dimer structure of diphenyl acetylene group has coplanarity, when polyimide synthesized by taking the diamine compound as raw material is used as alignment film, the pretilt angle of liquid crystal can be reduced.

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