▎ 摘　　要

NOVELTY - A blend of graphene nanoparticles and poly(styrene-co-methylmethacrylate) is formed by modifying graphene with nitric acid to form graphene nanoparticles surface-modified with oxygen functionalities, melt-blending poly(styrene-co-methylmethacrylate) and modified graphene nanoparticles to obtain a nanocomposite, and exposing nanocomposite to microwave irradiation to form defects in the graphene nanoparticles. USE - Formation of blend of graphene nanoparticles and poly(styrene-co-methylmethacrylate). ADVANTAGE - Interaction between graphene nanoparticles and poly(sytrene-co-methylmethacrylate) is improved. The presence of oxygen functionalities on the surface of modified graphene enhances the interaction with microwave irradiation, obtaining superior interaction of modified graphene and poly(sytrene-co-methylmethacrylate) matrix. The presence of polar groups on the surface of modified graphene improves the interaction of modified graphene after microwave radiation, obtaining stronger and higher storage modulus compared to unmodified graphene polymer composite. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for blend composition comprising graphene nanoparticles and poly(styrene-co-methylmethacrylate) in which graphene nanoparticles are dispersed in poly(styrene-co-methylmethacrylate), and graphene nanoparticles are surface-modified with oxygen functionalities.