Thermal and flame retardant properties of ethylene‐vinyl acetate copolymer/modified multiwalled carbon nanotube composites

Abstract

The synthesized flame retardant 9,10-dihydro-9-oxa-10-phosphaphanthrene-10-oxide/vinyl methyl dimethoxysilane (DV) was used to modify multiwalled carbon nanotubes (MWNTs). The results of FTIR, 1 H-NMR, and TGA measurements show that DV has been covalently grafted onto the surfaces of MWNTs, and the MWNTs-g-DV is obtained successfully. Transmission electron microscopy images show that a core-shell nanostructure appears with MWNTs as the core and the DV thin layers as the shell, and the modified MWNTs with DV can achieve better dispersion than unmodified MWNTs in EVM matrix. Thermogravimetric analysis and cone calorimeter tests indicate that the thermal stability and flame retardant are improved for the presence of the MWNTs in EVM matrix. Moreover, the improvement is more evident for EVM/MWNTs-g-DV composite compared to unmodified MWNTs-based composite, which can be attributed to the better dispersion of the DVmodified MWNTs and to the chemical structure of the combustion residue.

Layered double hydroxide-oxidized carbon nanotube hybrids as highly efficient flame retardant nanofillers for polypropylene

“…Moreover, no decomposition occurs beyond 425 °C for any of the materials, which indicates that a more thermally stable char could be generated at 425 °C after adding OCNTs. This finding could be attributed to the formation of a carbon layer on the surface of the samples 28 . These significant enhancements in decomposition temperatures are attributed to the synergetic effect between LDHs and CNTs.…”

“…This covers the entire surface of the sample without forming any significant cracks. Other studies have demonstrated that the dense network of nonflammable CNTs acts as a physical barrier to the diffusion of oxygen and also slows the escape of combustion products formed during decomposition, which can shield the polymer resin from external radiation and heat feedback from the flame 26 27 28 . However, although CNTs have shown good potential in flame retardancy their dispersion within the polymer matrix is normally poor, due to their hydrophilic nature.…”

Influence of Al(OH)3 nanoparticles on the mechanical and fire resistance properties of poly(methyl methacrylate) nanocomposites

“…The most widely studied nanofiber materials with respect to polymer fire retardancy are carbon nanotubes (CNTs) . Flame retardant properties of CNTs were studied in poly(ethylene vinyl acetate) , PMMA , unsaturated polyester , polyether ether ketone , and so on. Another group of nanoparticles, which can be used as fire retardant additives, are metal oxides, silica, and polyhedral oligomeric silsesquioxane .…”

Flame-retardant properties of ethylene-vinyl acetate/oil sludge/ fumed silica composites

“…Evaluation of the fire performance often involves quantifying heat generation and smoke generation, as the rate of smoke production (SPR) [32]. It can be seen in values of EOS1-EOS4 gradually decreased with more added SiO 2 , and the reduction was most evident for EOS4.…”