Transformations of phenolic antioxidants during the inhibited oxidation of polymers

Abstract

During ageing and oxidative degradation of stabilized polymers, transformations of antioxidants take place as a result of reactions with radicals RO’ and ROO, alkyl hydroperoxides and/or oxygen. Knowledge of these processes as well as of the properties of products thus formed is necessary for a complex evaluation of antioxidants. Data are given dealing with typical products of oxidative transformations of phenolic antioxidants prepared by independent syntheses, with model transformations under conditions simulating interactions in a stabilized organic substrate, with products identified under real conditions of oxidation of a stabilized substrate, and with influence of some transformation products on the course of oxidation of tetralin and poly-propylene. © 1973, Walter de Gruyter. All rights reserved.