Abstract
The effect of radiation on thermal and oxidative degradation of polyethylene was studied by thermogravimetric analysis. It was found that the thermal stability of polyethylene irradiated in a vacuum and in air at room temperature decreases with increasing radiation dose. In nitrogen the thermal decomposition of irradiated polyethylenes occurs in one stage without marked influences of the irradiation atmosphere. In the presence of air, oxidative degradation takes place in three stages, on which irradiation atmosphere has great effect. This is due to the difference in the chemical structure of irradiated polyethylenes.
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