Preparation and flame retardant properties of graphene polystyrene composite materials
Graphene polystyrene composite materials were prepared by solution blending method.The effects of the mass fraction of graphene oxide(GO)in the composite materials on the phase structure,microstructure,mechanical properties,thermal properties and flame retardancy were studied through XRD,SEM,FT-IR,me-chanical properties testing,thermal loss analysis,thermal conductivity and THR analysis.The results showed that polystyrene was adsorbed on the surface of GO,and the surface roughness was increased after the compos-ite of GO and polystyrene,without changing the chain structure of the polymer after the composite.The moder-ate doping of GO improved the mechanical properties of graphene polystyrene composite materials.The tensile strength,fracture elongation and elastic modulus of PG-6％composite materials reached their maximum val-ues,which were 38.8 MPa,10.37％and 1 505 MPa,respectively.Compared with pure PS,they increased by 26.38％,8.06％and 31.90％,respectively.The thermal conductivity and thermal diffusion coefficient of composite materials first increased and then decreased with the increase of GO proportion.The thermal conductivity and thermal diffusion coefficient of PG-6％composite material reached their maximum values,which were 0.170 W/(m·K)and 0.171 mm2/s,respectively.The addition of appropriate amount of GO improved the flame retard-ant performance of the composite material,increasing the difficulty of ignition and reducing the heat release rate.The PG-6％composite material had the best flame retardant performance,with a maximum FPI of 0.386.
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维普
