Synthesis and characterization of the first perfluoroaromatic polyimide of the AB-type

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• 作者：Tamara A. Vaganova ; Inna K. Shundrina ; Soltan Z. Kusov ; Elena V. Karpova ; Irina Yu. Bagryanskaya ; Evgenij V. Malykhin ; ^{malykhin@nioch.nsc.ru}
• 关键词：Fluorinated polyimides ; Polyimide properties ; Aminotrifluorophthalic anhydride ; Near-IR spectra
• 刊名：Journal of Fluorine Chemistry
• 出版年：2012
• 出版时间：March, 2012
• 年：2012
• 卷：135
• 期：Complete
• 页码：129-136
• 全文大小：574 K

文摘

Aminodefluorination of tetrafluorophthalic acid by anhydrous ammonia was shown to give 4-amino-3,5,6-trifluorophthalic acid selectively and in a high yield. Under the action of dicyclohexylcarbodiimide this acid was quantitatively converted into 4-amino-3,5,6-trifluorophthalic anhydride, which is the simplest monomer of the AB-type. The first perfluoroaromatic AB-type polyimide was prepared by the one-step high-temperature polycondensation in a benzoic acid melt and characterized using FTIR, NMR, UV-vis, MALDI TOF MS, and TG/DSC methods. The near-IR spectrum of the polyimide exhibits no absorption of C-H and O-H bond harmonic vibrations, which testifies to considerable promise of AB-type perfluorinated polyimides for optical communication systems.