Improved flame retardant of intumescent flame retardant flame-retarded high density polyethylene with fullerene decorated by iron compound

摘要

Fullerene decorated by iron compound (C60-Fe) was fabricated via solution reaction and characterized by X-rayphotoelectron spectra and wide-angle X-ray diffraction. By a partial replacement of intumescent flame retardant (IFR) inflame retarded polyethylene (PE) by C60-Fe, the flame retardant properties of PE/IFR composites were increased dramatically.When 2 wt% IFR was substituted by C60-Fe, a compact and continuous char barrier was formed, resulting in the reductionof the peak of heat release rate (PHRR) and the total heat released (THR). Also, the ignition time (tign) prolonged form 67 to114 s and the time to PHRR (tPHRR) prolonged form 208 to 455 s. The improvement on flame retardancy of PE/IFR/C60-Fecomposites was due to the synergistic influence between the catalytic charring ability of Fe and the free radical trappingeffect of C60.