Chemical Studies on the Effects of Radiation of Poly (vinylalcohol)

III. The End Groups formed by γ-Irradiation in vacuo of Dry Poly (vinylalcohol) Powder

Abstract

Dry poly (vinylalcohol) powder was irradiated in vacuo at room temperature with γ-rays up to 1.1×10⁸r. The scission of the main chain predominats as in the case of the irradiation in air. The G-value for the scission was 1.0. It was found that also in this case the carboxyl and carbonyl groups were formed by the scission. The amount of these groups formed was much smaller than in the case of the irradiation in air. The number of the two groups was equally 0.3-0.4 per a degradated molecule.