可溶含氟聚酰亚胺的合成与性能研究  

Synthesis and properties of soluble fluorinated polyimide

作　　者：杨成强 张帅 刘根[1,2] 王琴 王文燕[1,2] 陈刚 李光照 YANG Chengqiang;ZHANG Shuai;LIU Gen;WANG Qin;WANG Wenyan;CHEN Gang;LI Guangzhao(School of Materials Science and Engineering,Xihua University,Chengdu 610039,China;Engineering Research Center of Intelligent Air-Ground Integration Vehicle and Control(Xihua University),Ministry of Education,Chengdu 610039,China)

机构地区：[1]西华大学材料科学与工程学院,四川成都610039 [2]西华大学智能空地融合载具及管控教育部工程研究中心,四川成都610039

出　　处：《应用化工》2024年第8期1843-1846,1852,共5页Applied Chemical Industry

基　　金：自然资源部开放基金项目(2022IRERE402);四川省成都市龙泉驿区科技计划项目(2022-34-7);高分子材料工程国家重点实验室开放课题(sklpme2018-4-22);江西省稀土清洁生产重点实验室开放基金(E03MYB0310)。

摘　　要：以对氟苯甲醛和2,6-二甲基苯胺合成新型含氟二胺单体(FPMDA),再与均苯四甲酸酐合成,得到含氟聚酰亚胺(FPI)。通过核磁氢谱、质谱(MS)等对FPMDA和FPI进行结构表征,考察FPI的溶解性,并利用差示扫描量热分析(DSC)、热重分析(TGA)表征FPI的热性能。结果表明,FPI有优秀的溶解性,可溶于DMF、NMP、THF等溶剂中;以及良好的热稳定性,在氮气的环境下,FPI热分解温度Td 5%为550℃,Td 10%为580℃,1000℃时的残炭率为58.7%,玻璃化转变温度大于400℃。A novel fluorinated diamine monomer(FPMDA)was synthesized from p-fluorobenzaldehyde and 2,6-dimethylaniline,and then reacted with pyromellitic anhydride to obtain a fluorinated polyimide(FPI).The structures of the synthesized FPMDA diamine monomer and polyimide were characterized by FTIR,nuclear magnetic hydrogen spectroscopy,and mass spectrometry(MS);the thermal properties of the polyimide film were characterized using differential scanning calorimetry(DSC)and thermogravimetric analysis(TGA).The results showed that FPI has excellent solubility in solvents such as DMF,NMP,and THF.FPI also shows good thermal stability,under nitrogen environment,with thermal decomposition temperature Td 5%of 550℃,Td 10%of 580℃,and char yield of 58.7%at 1000℃,its glass transition temperature is greater than 400℃.

关 键 词：聚酰亚胺 耐高温 溶解性 

分 类 号：TQ31[化学工程—高聚物工业] TQ32