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The effect of surface pretreatment on carbon fibre–polyimide matrix composite bonding

✍ Scribed by Denise J. D. Moyer; J. P. Wightman

Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
740 KB
Volume
17
Category
Article
ISSN
0142-2421

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✦ Synopsis

Abstract

The single lap shear test and the wedge test were used to evaluate the effect of surface pretreatment on the strength and durability of adhesively boned composite joints. Both types of joints were placed in three different environments: (1) room temperature, desiccator, 1000 h; (2) 204°C, 1000 h; (3) immersion in boiling water for 3 days for the single lap shear test and until failure for the wedge test. The failure surfaces were analyzed using XPS to determine the locus of failure. An oxygen plasma was found to be the best pretreatment. The improvement in adhesive bonding following exposure to an oxygen plasma in comparison to the other surface pretreatment was attributed to several factors—a reduction in fluorocarbon contamination caused better wetting of the composite surface and also may lead to covalent bonding at the composite/primer interface.

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