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Aging of Polyimides in High Temperature Environments
Author(s) -
Wieneke Jan U.,
Staudt Claudia
Publication year - 2010
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201050113
Subject(s) - polyimide , thermogravimetric analysis , diamine , materials science , permeation , decomposition , polymer chemistry , degradation (telecommunications) , flexibility (engineering) , membrane , phenylene , chemical engineering , composite material , chemistry , polymer , organic chemistry , layer (electronics) , telecommunications , biochemistry , statistics , mathematics , computer science , engineering
Summary: Membranes made of high permeable fluorinated aromatic polyimide synthesized from 6FDA (4,4'‐hexafluoroisopropylidene diphthalic anhydride) and 4MPD (2,3,5,6‐tetramethyl‐1,4‐phenylene diamine) have been thermally treated to examine their aging behaviour at high temperature. The aging process was investigated by means of gas permeation tests, IR spectroscopy and thermogravimetric analysis combined with mass spectral analysis of the gaseous decomposition products. Up to around 400 °C thin films of the material show no major degradation but changes in color, flexibility and separation characteristics for O 2 /N 2 were observed.