Influenceof Different Metal Oxides on the Thermal, Combustion Properties andSmoke Suppression in Ethylene–Vinyl Acetate.

The composites based on ethylene–vinylacetate copolymer (EVA) and β-FeOOH, MoO3, or Sb2O3were prepared through a melt blending process.Apart from MoO3, the nanoparticles homogeneously dispersein the EVA matrix. In thermogravimetric analysis (TGA), EVA/5%MoO3and EVA/5%Sb2O3exhibit an enhancedthermal behavior at initial temperatures. However, β-FeOOH onlycan improve the thermal behavior of EVA at high temperatures. Theglass transition temperature (Tg) andthe storage modulus are all raised with the addition of β-FeOOH,MoO3, or Sb2O3. According to a conecalorimeter (CONE), the addition of these oxides brings an efficientreduction of the flammability parameters, such as peak heat releaserate (PHRR), total heat release (THR), peak smoke production rate(PSPR), total smoke production (TSP), peak carbon monoxide productionrate (PCOR), and so on. Laser Raman spectroscopy (LRS) and thermogravimetricanalysis-Fourier transform infrared spectrometry (TGA-FTIR) revealthe cause of the retarding combustion and smoke suppression of β-FeOOH,MoO3, or Sb2O3in EVA matrix. [ABSTRACT FROM AUTHOR]