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Thermal degradation of polyimides—I. Investigation of the role of isoimide structure on degradation process

✍ Scribed by J. Zurakowska-Orszagh; T. Chreptowicz; A. Orzeszko; J. Kaminski

Publisher
Elsevier Science
Year
1979
Tongue
English
Weight
236 KB
Volume
15
Category
Article
ISSN
0014-3057

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✦ Synopsis

The structures of isoimide cycles in polyimides were elucidated from i.r. and 13C NMR spectra of N-phenylphthalimide and N-phenylphthalisoimide. Using i.r. and gas-chromatographic data, conversion of isoimide cycles to the imide form was studied as a function of temperature. This process is irreversible, precluding the presence of the isoimide form at high temperature.

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