AI Article Synopsis
- The study focuses on using ladder phenyl/vinyl polysilsesquioxane (PhVPOSS) to enhance the flame-retardant properties of ethylene-vinyl acetate copolymer (EVA) composites mixed with aluminum hydroxide (ATH), leveraging the reactivity of PhVPOSS's vinyl groups.
- Experimental results from techniques like FTIR and TGA confirm that PhVPOSS integrates into the EVA structure and improves the thermal stability of the composites.
- Cone calorimeter tests reveal that EVA/ATH composites with PhVPOSS provide significantly better fire safety, with reductions in peak heat release rate and overall heat release, attributed to stronger Si-C and Si-O bonds
Article Abstract
The ladder phenyl/vinyl polysilsesquioxane (PhVPOSS) was used to improve the flame-retardancy performances of ethylene-vinyl acetate copolymer (EVA)/aluminum hydroxide (ATH) composites due to the reactivity of its vinyl groups. FTIR, XPS, H NMR, and SEM-EDS data demonstrated the PhVPOSS grafting onto EVA molecular chains. The PhVPOSS improved the thermal stability of EVA/ATH composites, as shown by the thermogravimetric analysis (TGA). Furthermore, with the cone calorimeter (CONE) experiments, EVA/ATH/PhVPOSS showed better fire safety than the EVA/ATH composites, with the PHRR, PSPR, and PCOP reduced by 7.89%, 57.4%, and 90.9%, respectively. The mechanism investigations of flame retardancy revealed that the charring behaviors of the EVA/ATH/PhVPOSS composites were improved by the formation of Si-C bonds and Si-O bonds, and a more compact and denser char layer can contribute more to the barrier effect.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10422530 | PMC |
| http://dx.doi.org/10.3390/polym15153312 | DOI Listing |
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