Electrical and Morphological Properties of Nanocomposite Based on Polypropylene/Ethylene Propylene Diene Monomer/Graphene

The effect of multilayer graphene (MLG) and few layer graphene (FLG) on electrical and morphological properties of polypropylene (PP)/ethylene propylene diene monomer (EPDM) blends prepared by melt mixing process is reflected in this work. The electrical percolation threshold of the prepared nanocomposites was found to be sensitive to the ratio of PP/EPDM and type of graphene. The percolation threshold was realized in the concentration range of 0.5 to 1 wt% of FLG for PP/EPDM (60/40). The power-law model was used to describe the behavior of electrical conductivity of the prepared nanocomposites based on graphene. In this model, the t parameter is dependent on aspect ratio anddispersion state of graphene. The morphology of the samples were characterized by wide-angle X-ray diffraction (WAXD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) which reveal that the electrical and thermal properties of prepared nanocomposites depend on the aspect ratio, dispersion state of graphene layers and size of the dispersed phase (EPDM).