可溶性含氟聚酰亚胺薄膜的制备及表征

Preparation and Characterization of Soluble Fluorinated Polyimide Films

通过分子设计制备一种新型二胺单体3,3'-二异丙基-4,4'-二氨基二苯基-4″-氟苯基甲烷(PAFM)及新型可溶性含氟聚酰亚胺薄膜材料(FPIs)。研究表明,聚合物溶解性能显著,能较好溶于常规有机溶剂,如N,N-二甲基甲酰胺(DMF)、N,N-二甲基乙酰胺(DMAc)、二甲亚砜(DMSO)、N-甲基吡诺烷酮(NMP)、四氢呋喃(THF)和丙酮;耐热性能突出,玻璃化转变温度高于273℃,氮气中10%热失重温度在470℃以上;光学性能优良,截止波长低于322 nm,波长大于466 nm范围内透过率都在80%以上;疏水性能优异,接触角超过90.8°。

A novel diamine monomer 3,3＇-diisopropyl-4,4＇-diaminodiphenyl-4＂-fluorophenylmethane （PALM） anda kind of soluble fluorinated polyimide （FPI） were synthesized by molecular design. The results indicate that the FPIs show excellent solubility in organic solvents, such as N, N-dimethylformamide （DMF）, N, N- dimethylacetamide（DMAe）, dimethylsulfoxide （DMSO）, N-methylpyrrolidone （NMP）, tetrahydrofuran （THF） and acetone, outstanding thermal stability with the glass transition temperature and 10 % mass loss temperature up to 273 12 and 470 12, respectively. Moreover, the obtained FPIs present prominent optical property with the cut-off wavelength below 322 nm and the wavelengths of 80 % transmittance more than 466 nm, and excellent hydrophobic character with the contact angle beyond 90.8°.