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Influence of flame-retardant additives based on Sb2O3 on PVC flammability
Abstract
Commercial flame-retardant additives based on Sb2O3 were evaluated. It was found that they have an acceptor, thermostabilizing and flame-retardant effect on PVC linoleum. Based on IR spectroscopy, DTA analysis, diffraction, and X-ray fluorescence analysis, it was found that one of the samples contains 100% Sb2O3, while the others contain microcrystalline CaCO3 (50-95%) and other compounds, e.g., organochlorines and hydrocarbons. The flame-retardant mechanism of PVC linoleum consists in the synergistic action of Sb2O3 and CaСО3 by binding gaseous hydrogen chloride formed during the combustion and thermal decomposition of PVC.
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