INVERSE GAS-CHROMATOGRAPHY IN THE STUDY OF POLYMER DEGRADATION .3. STUDY OF THE INHIBITED OXIDATION OF SQUALENE AS A MODEL FOR ANTIOXIDANT PROTECTED, NATURAL-RUBBER VULCANIZATES

Inverse gas chromatography with olefinic stationary phases, containing oxidation inhibitors, and air as carrier gas is shown to yield characteristic plots of retention index versus time, which may be explained in terms of the present knowledge of antioxidant action. A new technique for the evaluation of antioxidant efficiency is described that is sensitive to loss of antioxidant due to vaporization. Further evidence of the role of the support phase in inverse gas chromatography is presented and the adsorption of a hindered phenol used to give an estimate of the concentration of active sites on diatomaceous supports. © 1979 Friedr. Vieweg & Sohn Verlagsgesellschaft mbH.