Synergistic Effect of Nano-SiO_2 on PC/ABS/RDP Flame Retardant System

Environment friendly and flame retardant polycarbonate(PC) was prepared by resorcinol bis(diphenyl phosphate) as flame retardants and nano-SiO2 as synergistic agent.When loaded nano-SiO2 and RDP,respectively,a limiting oxygen index of at least 29 % and V-0 grade wereobtained.Morphology of the pyrolysis residue was investigated by SEM.The results of TGA,FTIR,SEM and optical micrographs showed that a little quantity of nano-SiO2 could increase the charresidue and stablize chars to improve the flame retardant performance of materials.