【摘要】 以3,5-二氨基苯甲酸十六醇酯(DBAAE)与醚类二胺按一定比例与四甲酸二酐共聚,得到支链化聚酰亚胺酸PIE-(1—3)系列,其中100%的DBAAE与四甲酸二酐聚合得到聚酰亚胺酸PID,将PID高温脱水环化制得可溶性PI添加到PIE-3中得到聚酰亚胺酸PIE-3a。通过红外、溶解性、膜韧性、TG、预倾角测试以及工业可靠性实验等手段对所制备的材料进行了结构与性能表征。研究表明:当DBAAE单体占总胺含量的30%时,固化后的PI膜柔韧性良好并且具有很好的溶解性能。PI随着支链化的增加,其热稳定性虽然逐渐下降但仍然十分优异。可溶性PI的加入使酰亚胺化率显著提高,用于液晶显示材料时,预倾角可达到4°～4.5°,并且工业可靠性测试结果优良。更多还原

【Abstract】 One of branched chain polyimide moleculars PIE-(1～3) series were synthesised via 3,5-diamino benzonic acid cetyl alcohol ester(DBAAE),ether diamine and pyromellitic acid dianlydride with a centain ratio,one of which named PID was synthesised via 100 pecentage DBAAE and pyromellitic acid dianlydride.Further,a kind of soluble PI was acuquired via PID dehydration and cyclization in high temperature.PIE-3a was optained bia blending the soluble PI and PIE-3.The samples were characterized by IR,solubility,film toughness,TG,pre-dip test and industrial reliability test.The results showed that: the cured polyimide film had good flexibility and good solubility when DBAAE monomers accout 30% among all the diaminie.With the branched chain parts increasing,the thermal stability gradually declining but still excellent.Imidization rate was significantly increased by blending soluble PI.The mixture exhibited pretilt angle in the region of 4 o~4.5 o to be the LCD alignment meterial,it also exhibited good industrial reliability.更多还原