摘要
我们开发了一种含苯乙烯侧链的可光聚合和可溶的新型聚酰亚胺(PICA) ,用于对向列相液晶取向。用长波线性偏振紫外光(LPUV)照射PICA薄膜 ,能得到很好的液晶取向。液晶的取向方向垂直于入射LPUV光的偏振轴。由PICA薄膜诱发的液晶分子的取向 ,在加热至85℃并保持450小时后仍保持不变。采用两次曝光的方法能使PICA薄膜产生小的预倾角。
A new photo_crosslinkable and solvent_soluble polyimide containing cinnamate side chains(PICA)was developed for aligning nematic liquid crystals(LCs).Good LC alignment was achieved by exposing a long_wave linearly polarized ultraviolet(LPUV) light to the PICA film.The LC alignment direction is found perpendicular to the polarization axis of the incident LPUV light.The uniform alignment of LC molecules induced by PICA films remains intact after being heated at 85℃ for 450 hours.A small pretilt angle on the PICA film was generated by the double exposure method.
出处
《现代显示》
2000年第2期41-46,共6页
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