These days, different types of carbon nano-fillers are used widely as a reinforcement agent in polymer composites like fullerenes, carbon nanotubes, graphene nano-platelets, and graphite platelets. Moreover, graphene-based materials and their composites have shown promising characteristics for a wide variety of applications in nano-science and nano technology. Adding graphene as a reinforcing agent in a polymer matrix has improved the overall performance and properties of these substances. In this review, the general properties of the nanoparticle in polymers have been studied. Also, the effect of these nano particles on the mechanical, thermal, and electrical properties of polymer composites has been investigated. It was demonstrated that filling graphene platelets in polymer materials improves their mechanical, thermal, and electrical properties.
