聚酰亚胺取向材料表面排列性能的研究

Study on the surface orientation properties of the polyimide aligning agents

合成了几种结构不同的聚酰亚胺取向材料。其中ＰＩ１～ｐＩ３用作标准３位半液晶显示屏的取向材料，在７０℃，９５％相对湿度下，经过７２ｈ试验后，除功耗电流略有增大外，表面排列性能良好。用ＰＩ４～ｐＩ６作取向材料制备试验盒，这些试验盒在１００℃Ｔ经２ｈ热处理后，具有２°～３°的预倾角。研究结果表明，对于含柔性长链添加剂的聚酰亚胺来说，固含量增大，预倾角呈上升趋势，而不含柔性长链添加剂的聚酰亚胺其预倾角与因含量无关。这些材料可用作ＴＮ－ＬＣＤ及简单８ＴＮ－ＬＣＤ的取向材料。

Several polyimide aligning agentswhich have different chemical structures aresynthsized.PI1～pI3 are used as a surface alignmentmateriaI to make the standard type LCD,At 70℃and 95%relative hurnidity for 72 hours,these LCDShave good surface orientation properties except alittle bigger power consurmption current.The testingLCD cells which use PI4～pI6 as a aligning agentsshow 2°～3°pretilt angle after 2 hours heating at100 ℃;The results indicate that the pretilt angleraises as the solid content of the polyimide whichcontain a flexible chain additive increases and it isindependant from the solid content of the polyimidewMchdoes not contain a flexible chain additive。These polyimides can be used as a aligning agent forTN-LCD and simple STN-LCD。