Photodegradation of Polyimides .2. Thermal Property Changes of Polyimides Based on a Hexafluorinated Dianhydride

Document Type

Article

Publication Date

7-5-1991

Department

Polymers and High Performance Materials

Abstract

Polyimides based on a hexafluorinated dianhydride decrease in thermal and thermal-oxidative stability upon photolysis with an unfiltered medium pressure mercury lamp source in air. Additionally, the glass transition of photolyzed polyimides containing the hexafluorinated moiety is lowered with increasing photolysis time. By contrast, pyromellitic-dianhydride-based polymers are relatively thermally stable even after prolonged photolysis under similar conditions.

Publication Title

Journal of Applied Polymer Science

Volume

43

Issue

1

First Page

11

Last Page

18

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