| 초록 |
There are some drawbacks that dust and scratches are generated in the polyimide rubbing process, and to solve the problems, researches on photoalignment have been intensively conducted. photoalignment can be induced by photocyclodimerization, photoisomerization, and photolysis reaction by irradiation with linearly polarized ultraviolet light. Especially, polymers having photocyclodimerizable groups are known as ones of the best materials for high photosensitivity and orientation stability. Recently, a research group in Korea Institute of Industrial Technology(KITECH) has successfully synthesized polymaleimides having cinnamate or chalcone groups capable of photocyclodimerization. To improve the photosensitivity and orientation stability, the mesogen compounds having the same photoreactive groups were synthesized in this study and used as an additive. In addition, the miscibility of these additives with the base polymers, liquid crystallinity, and photoreactivity were investigated. |
