The high stabilizing efficiency of element sulfur was revealed by the thermooxidative destruction of polymers of vinylchloride (VC). It was shown that the stabilizing efficiency of sulfur in compositions of polymers of VC is comparable with the efficiency of phenolic antioxidants. Element sulfur inhibits process of autooxidation of esters-plastifiers of polymers of VC, apparently, because of destruction of formed hydroperoxides. (c) 2006 Wiley Periodicals, Inc.