A photoalignable liquid crystalline (LC) polymer comprised of phenyl benzoate with a Schiff-base end moiety is synthesized and its thermally stimulated photoinduced reorientation behavior is investigated using linearly polarized (LP) 365 nm light. A significant in-plane reorientation (D>0.8) is achieved. The reoriented film exhibits a high birefringence (Δn=0.28) and a high thermal stability (~295 °C). Re-exposure of the reoriented film to LP 365 nm light reversely changes the orientation direction. However, the initial reoriented structure is recovered by re-annealing.

中文翻译：

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具有高双折射的液晶聚合物的光诱导分子重取向

合成了由具有Schiff碱端基的苯甲酸苯酯组成的可光取向液晶（LC）聚合物，并使用线性偏振（LP）365 nm光研究了其热激发的光致重定向行为。实现了明显的面内重新定向（D > 0.8）。该重新取向的膜表现出高双折射（Δn＝ 0.28）和高热稳定性（〜295℃）。将重新取向的膜重新暴露于LP 365 nm的光会相反地改变取向方向。但是，通过重新退火可以恢复最初的重新定向结构。