ENHANCED FLAME RETARDANCY OF POLYPROPYLENE BY MELAMINE MODIFIED GRAPHENE OXIDE

摘要

Graphene oxide (GO) is modified by melamine (MA) via the strong π-π interactions,hydrogen bonding and electrostatic attraction.PP composites are prepared by melt compounding method and GO/functionalized graphene oxide (FGO) is in-situ thermally reduced during the processing.During the thermal decomposition,the intercalated MA is condensed to graphitic carbon nitride (g-C3N4) in the confined micro-zone created by GO nanosheets.This in-situ formed g-C3N4 provides a protective layer to graphene and enhances its barrier effect.The heat release rate and the escape of volatile degradation products are reduced in the FGO based nanocomposites.