Issue 9, 1973

Antioxidative properties of phenyl-substituted phenols. Part I. The mechanism of synergism between 4-alkoxy-2,6-diphenylphenols and ββ′disubstituted diethyl sulphides

Abstract

A pronounced synergism between 4-alkoxy-2,6-diphenylphenols and ββ′disubstituted diethyl sulphides has been observed in the inhibition of autoxidation of polypropene at 180 °C. The mechanism of this synergistic action (at temperatures [gt-or-equal]150 °C) has been investigated. N.m.r. model experiments have shown that the phenolic antioxidant (AH) is regenerated continuously from the phenoxyl radical (A·) by hydrogen atom donation by the sulphenic acid, a product originating from the ββ-′disubstituted diethyl sulphide. This observation is of possible contributory importance to the understanding of the mechanism of synergistic effects.

Article information

Article type
Paper

J. Chem. Soc., Perkin Trans. 2, 1973, 1276-1279

Antioxidative properties of phenyl-substituted phenols. Part I. The mechanism of synergism between 4-alkoxy-2,6-diphenylphenols and ββ′disubstituted diethyl sulphides

C. R. H. I. de Jonge, H. J. Hageman, W. G. B. Huysmans and W. J. Mijs, J. Chem. Soc., Perkin Trans. 2, 1973, 1276 DOI: 10.1039/P29730001276

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