Mechanisms of oxidative degradation. II. Effect of metallic salts and metal deactivators on the oxidation of polybutadiene

Abstract

AbstractThe metal‐catalyzed oxidation of polybutadiene is further discussed. The mild catalytic effect of stearic acid on the oxidation was shown due to the synergism of the acid and a stearate. The synergism was also found for the mixture of two different stearates. The results of the preliminary study on the stabilization are given. For both iron and copper stearates, zinc diethyldithiocarbamate (ZDC) was found to be the best metal deactivator, and the chelated mixture behaved as an oxidation inhibitor. Tetramethylthiuram disulfide (TMT), phenyl‐β‐naphthylamine, and oxamide were less effective.