含长柔性链的主链聚酰亚胺的合成性能及其应用研究

以4,4-二氨基二苯醚(ODA)、十二胺和3,3’,4,4’-二苯醚四羧酸二酐(ODPA)为聚合体系,制备得到主链含长柔性链的聚酰亚胺酸,并且考查了KH-550硅烷偶联剂的加入量、含氟类聚硅氧烷的添加对聚合物性能的影响。实验结果表明,当KH-550达到6%时得到的聚酰亚胺膜的附着力达到1级,当添加总量0.1%的含氟聚硅氧烷时聚酰亚胺的含水率显著下降。用红外表征合成的聚酰亚胺的结构,利用TG表征聚酰亚胺的热稳定性,同时取向能力、预倾角测试以及工业可靠性实验表明,制备的材料可以作为扭曲排列型液晶显示器(TN-LCD)的取向材料使用。

Preparation, property and application of main chain polyimide containing soft chain

A main chain polyimide containing soft chain was synthesized via 4,4-diaminodiphenyl ether(ODA) and dodecylamine and 3,3′4,4′-diphenyl ether dianhydride(ODPA).Experiment researched the content and properties of adding 6% silane coupling agent KH-550 and 0.1% polysiloxane containing fluoride in PI.The results showed that modified PI adhesion can reach 1,and water content decreased significantly.The experiment results showed that when the KH-550 content reached to 6% can acquire LEVEL 1 adhesion,and 0.1% polysiloxane containing fluoride in PI can significantly decrease PI’s water content.The sample’s structure was charactered by IR,and the material’s thermal stability was checked by TG.At the same time the test results of orientation ability,alignment and industrial reliability showed that the material can be used as the orientation of TN-LCD materials.