A range of surface treatments including degreasing, abrasion, chromate etching, plasma etching and nitric-sulfuric acid etching were applied to unreinforced and 20 vol. % glass fiber reinforced polyetheretherketone. Single lap shear adhesive joints were prepared using a nylon-fabric-supported epoxy resin film adhesive. Plasma ashing produced adhesive joint strengths of 13 MPa in lap shear and correlated with substantial cohesive failure within the adhesive resin. Adhesion to the abraded surface was very low but it was significantly improved by grit blasting and by chromate etching.
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Hamdan et al. (1987) studied this question.
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