ABSTRACT A new photosensitive polyimide (PI) was successfully synthesised via esterification of PI containing hydroxyl groups with cinnamoyl chloride (CL). The cinnamate (CA) group contents of the PI was up to 90%. The PI films could induce uniform parallel alignment of liquid crystal (LC) molecules after the non-polarised ultraviolet ageing lamp exposure, which reduce the cost significantly compared with polarised ultraviolet light equipment. In addition, the PI exhibited good thermal stability. Meanwhile, the possible mechanism of PI alignment films induced by NPUVL was discussed in some detail. Graphical abstract

中文翻译：

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非偏光紫外老化灯照射下液晶配向用光敏聚酰亚胺的合成及配向可能机理研究

摘要 通过含有羟基的 PI 与肉桂酰氯 (CL) 的酯化反应，成功合成了一种新型光敏聚酰亚胺 (PI)。PI的肉桂酸酯(CA)基团含量高达90%。PI薄膜在非偏振紫外线老化灯照射后可以诱导液晶（LC）分子均匀平行排列，与偏振紫外线设备相比，成本显着降低。此外，PI表现出良好的热稳定性。同时，对NPULL诱发PI取​​向膜的可能机制进行了较详细的讨论。图形概要