Abstract
A study was made of kinetic regularities of the degradation of solid polypropylene (PP) during initiated oxidation at 115°. With low degrees of conversion the rupture of C-C bonds takes place by the breakdown of peroxide radicals; both the rate of oxidation and the rate of the main direction of degradation are proportional to the first power of the concentration of peroxide radicals in the system. C-C bonds are also fractured during the recombination of peroxide radicals, but this only represents ∼7% of the overall rate of degradation. With an increase in the degree of oxidation a third method of fracture of C-C bonds appears, which is due to the breakdown of hydroperoxide to radicals.
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