含氟聚酰亚胺薄膜的制备及性能研究
Preparation and Properties of Fluorinated Polyimide Thin Film
宋诗慧 1樊立平 1胡晓丹 1常树全1
作者信息
- 1. 南京航空航天大学 材料科学与技术学院,江苏 南京 211100
- 折叠
摘要
将六氟二胺(HFBAPP)、4,4'-二氨基二苯醚(ODA)两种二胺与 3,3',4,4'-联苯四羧基二酐(BPDA)、六氟二酐(6FDA)两种二酐进行缩聚反应,采用涂覆法成功合成了三种含氟聚酰亚胺薄膜(PI-1、PI-2、PI-3),并对其进行表征及介电性能、热稳定性能和力学性能研究.结果表明,在1 MHz下,主链中含较多三氟甲基的PI-1 介电常数最低,为2.71,优于商用聚酰亚胺(Kapton)薄膜,氟原子含量最高的PI-1 吸水率最低,为0.24%,在三种含氟PI中具有最高的接触角和最低的吸水率.三种含氟PI的Td5和Td10分别在 496～526℃和515～544℃,且在 800℃的碳产率均在 50%以上,具有良好的热稳定性,同时三种PI薄膜的拉伸强度仍满足使用要求.
Abstract
Hafluorodidiamine(HFBAPP),4,4'-diamino diphenyl ether(ODA)two diamines with 3,3',4,4'-biphentetracarboxylic anhydride(BPDA),hexafluorodihydride(6FDA)two dianhydride species for polycondensation reactions,three fluorinated polyide films(PI-1,PI-2,PI-3),charactercharacterization and dielectric properties,thermal stability and mechanical properties.The results show that at 1 MHz,the PI-1 containing more trifluoromethyl group in the backbone has the lowest dielectric constant of 2.71,which is better than the commercial polyimide(Kapton)film,and the PI-1 with the highest fluorine atomic content has the lowest water absorption,0.24％,which has the highest contact angle and the lowest water absorption among the three fluorine PI.The three fluorine PI Td5 and Td10 are in the range of 496℃ to 526℃ and 515℃ to 544℃,respectively,and the carbon yield at 800℃ is above 50％,with good thermal stability,and the tensile strength of the three PI films still meets the use requirements.
关键词
含氟聚酰亚胺/介电性能/热稳定性Key words
fluoropolimide/dielectric properties/thermal stability引用本文复制引用
基金项目
基础科研计划项目(JCKY2021605B031)
国家自然科学基金(12275131)
出版年
2024
NETL
NSTL
万方数据