Flame Retardancy and Thermal Degradation Behaviors of Thiol-Ene Composites Containing a Novel Phosphorus and Silicon-Containing Flame Retardant

Abstract

In this article, a novel phosphorus and silicon-containing flame retardant (DOPO-V-PA) was synthesized via condensation reaction and then added into thiol-ene (TE) to prepare a flame-retardant composite. The results of cone calorimeter measurement demonstrated that, compared with pure TE, 22.7% and 53.2% reduction of TE/DOPO-V-PA (thiol-ene/9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide-vinyltrimethoxysilane-phenyltrimethoxysilane-(3-aminopropyl)trimethoxysilane copolymer) was found for the peak heat release rate (PHRR) and total heat release (THR), respectively. The thermal degradation of TE composites was investigated by the TGA measurement under non-isothermal conditions, and kinetic parameters were both calculated by the Kissinger and Flynn-Wall-Ozawa methods. It was indicated that the activation energies of TE at conversions exceeding 50% were enhanced by the incorporation of DOPO-V-PA for the whole conversion range.

A New Phosphorous/Nitrogen-Containing Flame-Retardant Film with High Adhesion for Jute Fiber Composites

“…Compared with the FNF sample, the Av-COY and Av-CO 2 Y of the coated FNFs decreased significantly; the FNFs-5 sample had the lowest Av-COY and Av-CO 2 Y, reducing to 0.013 kg/kg and 0.9 kg/kg. As shown in Figure 6c, the first peak of the coated sample appeared in the SPR curve soon after combustion, which was related to the decomposition of the phosphate ester group in the coating [34]. The decomposition of the phosphate ester group increased the formation of the carbon layer, which effectively reduced the Av-COY and AV-CO 2 Y.…”