Use of expandable graphite as debonding on demand technology between glass fibre reinforced polyamide 6 and aluminium

A heat triggered debonding-on-demand thermoset-based adhesive is developed to join the glass fiber reinforced thermoplastic polyamide-6 to aluminium alloy sheet. The hybrid composite interface debonding mechanism is heat triggered at the end-of-life of the hybrid composite toward recycling of its components. The debonding-on-demand adhesive joint consist of an ARALDITE® brittle thermoset variant functionalized with 10% Expandable Graphite. TGA analysis and shear lab test are conducted to evaluate the effect of the Expandable Graphite on the degradation and mechanical performances of the ARALDITE® resin. Once validated the developed debonding-on-demand solution is up-scaled to a U-shape part made on inverse hybrid laminates.