含叔丁基/异丁基二胺的可溶性透明聚酰亚胺的合成与性能  

Synthesis and Properties of Soluble Transparent Polyimides Containing tert-Butyl and Isobutyl Groups†

作　　者：王寿柏 吴修明 吴锦明[1] 汤艳峰[1] 束辰 钟敏 黄卫[3] 颜德岳[3] WANG Shoubai;WU Xiuming;WU Jinming;TANG Yanfeng;SHU Chen;ZHONG Min;HUANG Wei;YAN Deyue(School of Chemistry and Chemical Engineering,Nantong University,Nantong 226019,China;Xinglin College,Nantong University,Nantong 226019,China;School of Chemistry and Chemical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]南通大学化学化工学院,南通226019 [2]南通大学杏林学院,南通226019 [3]上海交通大学化学化工学院,上海200240

出　　处：《高等学校化学学报》2021年第9期2944-2952,共9页Chemical Journal of Chinese Universities

基　　金：上海市科学技术委员会基础重点项目(批准号:16JC1403600)资助。

摘　　要：通过分子设计合成了异丁基桥联2-叔丁基苯胺的新型二胺单体4,4′-(2-异丁基)双(2-叔丁基苯胺),并将其分别与4种商品化芳香族二酐经高温“一步法”缩聚制得了系列聚酰亚胺(PI)树脂.采用多种测试手段研究PI的结构和性能,结果表明,该系列新型聚酰亚胺不但可溶于N-甲基吡咯烷酮及N,N-二甲基甲酰胺等高沸点溶剂,而且在乙酸乙酯和三氯甲烷等低沸点溶剂中也具有良好的溶解性.该系列PI保持了良好的热稳定性,在N_(2)中5%热失重温度均在480℃以上,玻璃化转变温度(Tg)介于307~356℃之间.经溶液刮涂制得的PI薄膜具有良好的光学透明性,在可见光区平均透过率可达82.3%~89.1%,截止波长介于313~363 nm之间.同时,该系列PI薄膜还具有良好的机械性能和疏水性,有望应用于光伏发电及柔性显示等领域.A novel diamine containing tert-butyl and isobutyl groups{4,4′-(2-isobutyl)bis[2-(tert-butyl)aniline],IBBTBA}was synthesized from 2-tert-butyl aniline and isobutyraldehyde.Then a series of polyimides(PIs)was prepared from IBBTBA and four aromatic dianhydrides by the high-temperature one-plot polymerization.The structure and properties of the PIs were investigated in detail.The results indicate that all PIs show good solubility not only in high-boiling aprotic solvents[N-methylpyrrolidone(NMP),N,N-dimethylacetamide(DMAc),etc.],but also in low boiling point solvents[ethyl acetate(EA),CHCl_(3),etc.].They can be processed into flexible films easily by the solution casting or blade coating.All the resulting PI films(around 25μm in thickness)have good transparency with the average transmittance from 82.3%to 89.1%and the cut-off wavelength from 313 nm to 363 nm in the visible light region.Satisfactorily,all PIs still maintain the good thermal stability.Their 5%mass loss temperatures(in N_(2))are above 480℃and T_(g) values are in the range from 307℃to 356℃.Besides,all PIs films exhibit good mechanical properties and hydrophobicity.In summary,these PI films are potential candidates for applications in the fields of photovoltaic power generation,flexible display and so on.

关 键 词：聚酰亚胺 叔丁基 异丁基 可溶性 透明性 

分 类 号：O631[理学—高分子化学]