Effects of Ionizing Radiations on Polyethylene

概要

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Polyethylene films were irradiated in the air by deuterons accelerated by a cyclotron and by gamma rays from cobalt-60 source. Gel fraction, swelling ratio, weight changes and infrared absorption spectra of irradiated specimens were measured. It was found that the specimen irradiated by deuterons was cross-linked and became insoluble in xylene. The effects of deuteron irradiation seem almost the same as those of other ionizing radiations such as pile or gamma rays. Infrared absorption spectra reveals some difference in that the ratio of E_<co>/E_<cc> is 0.65 in the deuteron irradiation and is smaller than the value of 14.0 resulting from gamma ray irradiation, where E_<co> is the optical density of carbonyl groups and E_<cc> that of unsaturation. Some considerations are given on the possible explanation of this difference.
1958-06-05