含氟聚酰亚胺薄膜的制备及性能研究  

Preparation and Properties of Fluorinated Polyimide Thin Film

作　　者：宋诗慧 樊立平 胡晓丹[1] 常树全[1] Song Shihui;Fan Liping;Hu Xiaodan;Chang Shuquan(College of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 211100,China)

机构地区：[1]南京航空航天大学材料科学与技术学院,江苏南京211100

出　　处：《山东化工》2024年第11期1-4,共4页Shandong Chemical Industry

基　　金：基础科研计划项目(JCKY2021605B031);国家自然科学基金(12275131)。

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T_(d5)和T_(d10)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。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 T_(d5) and T_(d10) 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 

分 类 号：TQ323.7[化学工程—合成树脂塑料工业] TB332[一般工业技术—材料科学与工程]