▎ 摘　　要

NOVELTY - Graphene/polystyrene nanocomposite composition comprises graphene nanoparticles and a poly(styrene-co-methyl-methacrylate), where a content weight ratio of styrene to methyl methacrylate is 60-80/20-40. The graphene nanoparticles are dispersed in the poly(styrene-co-methyl-methacrylate) and are thermally oxidized, and have surface carboxy groups. USE - Used as graphene/polystyrene nanocomposite composition. ADVANTAGE - The graphene/polystyrene nanocomposite composition has an intensity level of the D band at 1357/cm of 2000-2200 and an intensity level of the G band at 1583/cm of 2050-2200, a storage modulus of 1800-2200 MPa at 100 degrees C and 1400-1800 MPa at 40 degrees C, a glass transition temperature of 92-106 degrees C, and improved interaction of modified graphene with poly(styrene-co-methyl-methacrylate), thus exhibiting improved mechanical properties and excellent thermal stability.