▎ 摘　　要

NOVELTY - A composition of matter comprises (a) a polymer (P1), (b) a polymer-graphene compatibilizer comprising polymer (P1) and one or more aromatic moieties grafted to the polymer (P1), and (c) exfoliated graphene nanoparticle platelets. The polymer-graphene compatibilizer and the platelets are coupled via pi - pi interactions between the aromatic moieties of the compatibilizer and basal planes of the platelets. The polymer (P1) is selected from polyolefins, polyamides, proteins, polyesters, polyethers, polyurethanes, polysiloxanes, celluloses, polysulfides, polyacetals, rubbers and/or copolymers. USE - Composition of matter used in formation of composite material (claimed). ADVANTAGE - The composition comprising aromatic moiety act as a toughener to improve the adhesion and fracture properties of the thermoset composite, and as compatibilizer to improve the dispersion of EGN platelets in the cured thermoset. The EGN platelets have increased mechanical, thermal, and electrical properties. DETAILED DESCRIPTION - A composition of matter comprises (a) a polymer (P1), (b) a polymer-graphene compatibilizer comprising polymer (P1) and one or more aromatic moieties grafted to the polymer (P1), and (c) exfoliated graphene nanoparticle platelets dispersed in the polymer-graphene compatibilizer. The polymer-graphene compatibilizer and the platelets are coupled via pi - pi interactions between the aromatic moieties of the compatibilizer and basal planes of the platelets. The polymer (P1) is selected from polyolefins, polyamides, proteins, polyesters, polyethers, polyurethanes, polysiloxanes, celluloses, polysulfides, polyacetals, polyethylene oxides, polycaprolactams, polycaprolactones, polylactides, polyimides, polycarbonates, polyether imides, vinyl monomer-based thermoplastics, epoxy resins, polyureas, phenol-formaldehyde, urea-formaldehydes, melamine-formaldehydes, polyimides, alkyds, rubbers and/or copolymers. INDEPENDENT CLAIMS are included for the following: (1) Polymer-graphene compatibilizer, which comprises the aromatic moieties grafted to the polymer via a reaction product of (A) a pendant anhydride group on the polymer (P1), (B) a diaminoalkane forming a linking group between the aromatic moiety and the polymer (P1), and (C) an aldehyde-functional aromatic hydrocarbon forming the aromatic moiety; (2) formation of dispersion of exfoliated graphite nanoparticle (EGN) platelets in a polymer-graphene compatibilizer, which involves providing the composition, mixing the composition to provide the polymer-graphene compatibilizer in solution with the solvent and dispersing the EGN platelets in the solvent, and removing the solvent from the composition; (3) formation of polymer-graphene compatibilizer, which involves reacting aldehyde-functional aromatic hydrocarbon, a polyaminoalkane, and the polymer (P1) to form the polymer-graphene compatibilizer. The aromatic moiety is derived from the aldehyde-functional aromatic hydrocarbon, and the polyaminoalkane forms an imine linkage to the aromatic moiety and an amide linkage to the polymer (P1); and (4) formation of composite material, which involves providing the composition, providing a polymer (P2) as a matrix polymer, and melt blending the composition and the polymer (P2). The polymer (P2) can be the same as or different from the polymer (P1) of the polymer-graphene compatibilizer.