| 초록 |
Polyimide rubbing method for alignment liquid crystal has drawbacks of generating dust and scratches. In order to solve these problems, research on the photoalignment method have intensively been conducted. The photo-alignment methods induce liquid crystal alignment by causing photocyclodimerization, photoisomerization, and photodecomposition reactions by irradiation with linearly polarized ultraviolet light. In this study, polyimide containing a chalcone group in the side chain was synthesized and film was prepared in order to investigate its photoalignment properties. The polyimide contains dianhydride comonomer having a carbon-carbon double bond, and an alkyl chain containing hydroxyl group was attached at the end through a polymer reaction of thiol-ene reaction, and then, the final material was synthesized through an esterification reaction with a carboxyl-functionalized chalcone derivative. Thereafter, photoalignment characteristics were evaluated using various analysis methods. |
