Preparation of graphene oxide/aluminum hypophosphite hybrids and improved flame retardancy of polycarbonate(PC)/acrylonitrile buta-diene styrene(ABS)blends
Preparation of graphene oxide/aluminum hypophosphite hybrids and improved flame retardancy of polycarbonate(PC)/acrylonitrile buta-diene styrene(ABS)blends
As one of the most used plastic alloys,the flammability of polycarbonate(PC)/acrylonitrile butadiene sty-rene(ABS)(70/30 mass ratio)blend(PC/ABS)alloys is a threat to the safety of people's lives and property during its service,so it is necessary to improve the flame retardancy of the PC/ABS alloys.Herein,poly-ethylenimine(PEI)-grafted graphene oxide nanosheets(PEI-GO)were fabricated to decorate aluminum hypophosphite(AHP)through a self-assembly strategy.PEI-GO@AHP hybrids were prepared as a flame retardant for PC/ABS blends.The addition of 8％mass ratio PEI-GO@AHP to PC/ABS resulted in a material with a UL-94 V-0 rating and a limiting oxygen index(LOI)of 29.1％.The peak heat release rate(PHRR)and total heat release(THR)were decreased by 41.0％and 19.6％,respectively.Furthermore,the PEI-GO nanosheets reduced the phosphine(PH3)concentration during com-bustion.This work provides a simple but effective way to fabricate flame-retardant PC/ABS blends.
维普
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