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

Laachachi A., Kachouri O., Berndt J., Zucker G., Zopp C., Bartelt J., Makradi A.

Journal of Advanced Joining Processes, vol. 13, art. no. 100369, 2026

Abstract

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.

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LAACHACHI Abdelghani

LAACHACHI Abdelghani

Advanced fibre engineering and semi-finished products

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KACHOURI Oussema

KACHOURI Oussema

Advanced fibre engineering and semi-finished products

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MAKRADI Ahmed

Advanced composite manufacturing and testing

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