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In this paper, the adhesion of epichlorohydrin rubber (CHR) compounds to polyamide 6 (PA6) using a molecular adhesive (6-triethoxysilylpropylamino-1,3,5-triazine-2,4-ditiol, TES) has been investigated to clarify the relation between TES concentration on the PA6 surface and the peel strength of CHR/PA6 adherends. TES contains two functional groups, one is dithiol triazinyl group and the other is alkoxysilyl group. The former reacts with the chloromethyl group of CHR, the latter reacts with the OH group linked PA6 which was formed by the corona discharge treatment. The introduction of TES on the PA6 surface was analyzed by X-ray photoelectron spectroscopy (XPS). As a result, TES concentration on the PA6 surface and peel strength of CHR/PA6 adherends were influenced by the concentration and reaction temperature of TES in solution.In addition, TES concentration on the PA6 surface correlated closely with the peel strength of CHR/PA6 adherends. The failure pattern in CHR/PA6 adherends varied from interfacial failure to cohesive failure by the way of apparent interfacial failure, with the increase of TES concentration on the PA6 surface.

Direct Adhesion of Epichlorohydrin Rubber to Polyamide 6 During Curing Using a Molecular Adhesive