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Photodegradation of polyimides. I. A spectral, viscometric, chromatographic, and weight loss investigation of polyimides based on a hexafluorinated dianhydride
Author(s) -
Hoyle C. E.,
Anzures E. T.
Publication year - 1991
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1991.070430101
Subject(s) - pyromellitic dianhydride , polyimide , photodegradation , moiety , photodissociation , decomposition , materials science , yield (engineering) , polymer chemistry , degradation (telecommunications) , photochemistry , chemistry , organic chemistry , photocatalysis , catalysis , composite material , computer science , telecommunications , layer (electronics)
The photodegradation of aromatic‐dianhydride‐based polyimide films in air with hexafluorinated groups in the dianhydride moiety is characterized by significant weight loss and chain cleavage. A conventional polyimide film based on pyromellitic dianhydride yields little decomposition under similar conditions of photolysis. Emission changes on photolysis of polyimide solutions demonstrate an efficient rearrangement to yield a highly fluorescent species which can be used as an effective tool for following the degradation process.