ELECTRON SPIN RESONANCE SPECTRA AND CHANGE OF PHYSICAL STATE IN IRRADIATED POLYETHYLENE (in Japanese)
By use of irradiation and ESR measurements at temperatures from 77 to 400 deg K, information on the nature of the ESR spectra of irradiated polyethylene was obtained. Up to the order of 10/sup 6/ rads of irradiation dose, two kinds of patterns are seen superposed in ESR spectrum obtained at room temperature --one a six-line pattern corresponding to alkyl type free radicals, and the other a seven-line pattern corresponding to alkyl type free radicals-- separated from each other by the differences in decay rates of their respective patterns at room temperature. When the dose increases over 10/sup 9/ rads, the ESR spectrum of irradiated polyethylene becomes a single-line spectrum, which is considered to be the spectrum corresponding to the polyene type radicals. If the irradiation is carried out at 77 deg K and the spectrum is measured at the same temperature, a rather apparent six-line spectrum is observed, reflecting the dominant existence of free radicals of alkyl type. The six-line pattern decays rapidly, and a seven-line pattern is stable at room temperature. (T.F.H.)
- Research Organization:
- Japanese Assn. for Radiation Research on Polymers, Tokyo
- NSA Number:
- NSA-17-029930
- OSTI ID:
- 4684153
- Journal Information:
- Proc. Japan Conf. Radioisotopes, Journal Name: Proc. Japan Conf. Radioisotopes Vol. Vol: 4th
- Country of Publication:
- Country unknown/Code not available
- Language:
- Japanese
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