Abstract
AbstractReflection absorption infrared spectroscopy (RAIR) has been used to investigate the effects of different surface materials (interstitial free steel (IFS), aluminium (2024‐A1) and copper) on the thermo‐oxidative degradation of a commercial two part epoxy adhesive system. The epoxy resin was spin‐coated on polished metal substrates and aged at 125°C for different periods of time. Based on the relative changes in intensities of the amide, ether and alcohol bands during exposure, it was found that the fastest degradation took place on the Cu surface, whereas the slowest happened on the 2024‐Al surface. The accelerated degradation observed on the Cu surface was partly attributed to the preferential adsorption of labile amino and amide groups on the Cu surface.
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