| 초록 |
We synthesized a series of plant-based and renewable eugenol substituted polystyrene (PEUG#) (# = 20, 40, 60, 80, and 100, where # is the substitution ratio of eugenol moiety in the polymer). Eugenol is an oil extracted from cloves. We used polymer modification reactions to investigate LC alignment behavior of polymer films. We found that polymers with higher substitution ratios of eugenol side groups have general trend to exhibit vertical LC alignment. LC cells made from polymer films with a higher molar content of eugenol side groups exhibited vertical LC alignment behavior. Vertical alignment behavior was correlated with polar surface energy value of polymer films. The vertical alignment could be formed when the low polar surface energy value of the polymer generated by the nonpolar carbon group. Electro-optical performances (VHR, R-DC, and thermal alignment stabilities) were good enough to be observed for LC cells using PEUG100 polymer as an eco-friendly LC alignment material. |
