HYPER-BRANCHED POLYMER GRAFTING GRAPHENE OXIDE AS AN EFFECTIVE FLAME RETARDANT AND SMOKE SUPPRESSANT FOR POLYSTYRENE

摘要

A well-defined functionalized graphene oxide (FGO) grafted by hyper-branched flame retardant based on N-aminoethyl piperazine and phosphonate derivative was synthesized to reduce flammability and toxicity of polystyrene (PS).Micro combustion calorimeter and steady state tube furnace were employed to evaluate the heat and non-heat fire hazards of PS nanocomposites.Furthermore,PS-FGO nanocompsites obviously decreased the amount of flammable and toxic volatiles evolved,such as the aromatic compounds,carbonyl compounds,carbon monoxide,indicating suppressed fire hazards of the PS composites.