کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1314719 1499365 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and characterization of the first perfluoroaromatic polyimide of the AB-type
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Synthesis and characterization of the first perfluoroaromatic polyimide of the AB-type
چکیده انگلیسی

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.

Figure optionsDownload as PowerPoint slideHighlights
► Convenient method for synthesis of 4-aminotrifluorophthalic anhydride was elaborated.
► The first perfluoroaromatic polyimide of AB-type was obtained.
► Optical and thermal properties of PI-AB were studied.
► Perfluorinated PIs of AB-type are promising materials for optical telecommunications.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Fluorine Chemistry - Volume 135, March 2012, Pages 129–136
نویسندگان
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