In this research, we have prepared epoxy/graphene nanocomposites (graphene content: 1,
3, 5, 7, and 9 wt%) to investigate some mechanical (impact strength, hardness, and Brazilian tests)
and thermal properties (thermal conductivity and thermogravimetric analysis). Our results show that
the impact strength, hardness, and compression strength values increased to 5.04 kJ/m2, 79.8, and
27.85 MPa, respectively, as increasing graphene content up to 5 wt% and then decreased for further
increasing of the graphene content. The observed reduction in the hardness could be attributed to
the samples brittleness. On the other hand, the thermal conductivity increased with increasing the
graphene content because of the high thermal conductivity of graphene and thus the efficiency
increase with increasing of graphene content. In addition, the thermal stability of epoxy/graphene
composite increase compared with pure epoxy resin, while the activation energy for samples
consists of 9 wt% graphene greater than those containing 1 wt% graphene.
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