Effects of Nano-Filler on the Thermal and Fire-Resistant Properties of Ethylene-Vinyl Acetate Copolymer

摘要

Sepiolite (S9,B10,B20,B40) and boehmite have been added to an intumecent flame retardant (IFR) system to produce the halogen-free and fire-resistant ethylene-vinyl acetate copolymer (EVM) rubber. The rubber contains ammonium polyphosphate (APP) as acid source,double pentaerythritol (D-PER) as carbon source and melamine (MN) as gas source. The effects of nano-filler sepiolite and boehmite on the fire-resistant property of EVM rubber based on IFR system were investigated. The test results show that the system with nano-filler of sepiolite B10 has the best fire-resistant property. The process of smoke emission and thermal decomposition,the element composition of char surface and the micro morphology of intumecent char layer of the EVM IFR system with nano-filler were also studied by NBS chamber,thermogravimetric (TG) analysis,X-ray photoelectron spectroscopy (XPS) and scanning electron microscope (SEM).