Poly (Vinyl Chloride) powders were submitted to irradiation in the dose range 25-150 kGy and in vacuum, argon and air atmosphere conditions. The free radicals induced by radiation were investigated by EPR measurements performed at different times from the end of irradiation. Obtained results confirmed that at room temperature the Poly (Vinyl Chloride) degradation process causes the formation of polyenil radicals, which can react with the oxygen diffused into the polymer giving rise to peroxyl radical species. The ratio of polyenil and peroxyl radicals is a function of the experimental condition atmosphere.
Radical formation induced by gamma radiation in poly(vinyl chloride) powder
COSTA, Luigi;BRUNELLA, VALENTINA GIOVANNA;PAGANINI, Maria Cristina;
2004-01-01
Abstract
Poly (Vinyl Chloride) powders were submitted to irradiation in the dose range 25-150 kGy and in vacuum, argon and air atmosphere conditions. The free radicals induced by radiation were investigated by EPR measurements performed at different times from the end of irradiation. Obtained results confirmed that at room temperature the Poly (Vinyl Chloride) degradation process causes the formation of polyenil radicals, which can react with the oxygen diffused into the polymer giving rise to peroxyl radical species. The ratio of polyenil and peroxyl radicals is a function of the experimental condition atmosphere.
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