| 초록 |
We synthesized a series of phthalimide substituted polystyrene (PPH#) to investigate liquid crystal (LC) alignment behaviors of LC cells made with PPH# films. PPH# films exhibited good optical transparency in visible light region than polyimide (PI) film, commercialized in display industry. LC cell made from pristine polystyrene (PS) film showed planar LC alignment in perpendicular direction with respect to rubbing direction, whereas LC cells made with PPH# films exhibited planar LC alignment in parallel direction with respect to rubbing direction when substitution ratio was more than 20 mol%, respectively. In addition, long-term stability of LC cell made from pristine PS was very low. However, that of LC cells made from PPH#s were remarkably enhanced as well as ultraviolet stability. Therefore, this study contributes to technology of producing planar and parallel LC alignment on PS derivatives and can be applied to next-generation display industry including flexible display. |
