Effect of Concentration of Atactic Polypropylene on Its Rate of Autoxidation

摘要

A general scheme previously reported for the autoxidation of polyolefins is further substantiated by results obtained for the uncatalyzed and catalyzed autoxidation of various concentrations of atactic polypropylene (APP) (by admixture with polyisobutylene) under various experimental conditions. Thus, rates of maximum carbonyl formation were measured as a function of APP concentration at 120C, oxygen concentrations ranging from 0.5 - 100% by volume and cobaltic acetylacetonate catalyst concentrations (3 and 17) x 0.0000001 mole/7.5 mg sample. Good agreement was found between experimentally observed and theoretical dependencies of the maximum carbonyl formation rate on APP concentration derived from the combined reaction scheme. (Author)