The role of sodium perfluorobutyrate in promoting the antioxidancy of DODPA in synthetic esters

From: Tribology Transactions | Date: January 1, 1999| Author: | Copyright information

Differential scanning calorimetry (DSC) and oxidation-corrosion tests were employed to evaluate the inhibition of pentaerythritol ester containing sodium perfluorobutyrate (C^sub 3^F^sub 7^COONa) towards oxidation. The results show that C^sub 3^F^sub 7^COONa enhances antioxidancy of p,p'dioctyldiphenylamine (DODPA). The changes occurring to DODPA in the oxidation of esters, with and without C^sub 3^F^sub 7^COONa, were followed by mass (GC/MS) chromatography (MC). The proposed mechanism of the inhibition involves a synergy between alkali metal salts and arylamines. Although DODPA does not ...

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