Mechanical properties, morphology and thermal conductivity of polyamide composites filled with graphene nanoplatelets, Al₂O₃and graphite

In this work, PA6/PA66/GNP thermal composites were prepared via a melt blending method. Mechanical properties, morphology and thermal properties of PA6/PA66/GNP composites were investigated. The thermal conductivity of composite containing 50 wt-% of graphene nanoplatelets was measured as 5·03 W m–1 K–1 at 30°C. When the Al2O3 was replaced for graphene nanoplatelets, the thermal conductivity of composites decreased, but the mechanical properties improved. The optimum amount of Al2O3 which replaced graphene nanoplatelets is 10%. When graphite was used to replace for graphene nanoplatelets, thermal conductivity basically remained unchanged but mechanical properties decreased.