Effects of plasma treatment of polyimide on the adhesion strength of epoxy resin / polyimide j oints

The effects of plasma treatment of pyromellitic dianhydride-4,4'-oxydianiline polyimide (PMDA-ODA PI) on the adhesion strength of novolac epoxy resin/PMDA-ODA PI joints were studied. The adhesion strength of novolac epoxy resin/PMDA-ODA PI joints increased by plasma treatment of PMDA-ODA PI. Ox...

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Bibliographic Details
Published in:Journal of adhesion science and technology 1997-01, Vol.11 (1), p.95-104
Main Authors: Yun, H.K., Cho, K., Kim, J.K., Park, C.E., Sim, S.M., Oh, S.Y., Park, J.M.
Format: Article
Language:English
Subjects:
Adhesion strength
epoxy resin
plasma treatment
polyimide
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Summary:The effects of plasma treatment of pyromellitic dianhydride-4,4'-oxydianiline polyimide (PMDA-ODA PI) on the adhesion strength of novolac epoxy resin/PMDA-ODA PI joints were studied. The adhesion strength of novolac epoxy resin/PMDA-ODA PI joints increased by plasma treatment of PMDA-ODA PI. Oxygen and argon plasmas were better than ammonia plasma in improving the adhesion strength. However, the adhesion strength decreased by aging oxygen and argon treated PMDA-ODA PI above 150 C and ammonia treated PMDA-ODA PI above 250 C, which was not correlated with the surface energy of thermally aged plasma treated PMDA-ODA PI. The failure mode of the joints was found to be cohesive in the PMDA-ODA PI layer very close to the interface. The adhesion mechanism of novolac epoxy resin/plasma treated PMDA-ODA PI joints was investigated and the decrease of adhesion strength by thermally aging the plasma treated PMDA-ODA PI was examined.
ISSN:0169-4243
1568-5616
DOI:10.1163/156856197X01038