STUDY BY ELECTRON PARAMAGNETIC RESONANCE OF POLYVINYL CHLORIDE IRRADIATED BY X RAYS (in French)
The results obtained previously on the decrease in active centers in gamma -irradiated polyvinyl chloride after reheating to room temperature are in disagreement with results obtained by others. It appears that the disagreement can be due to a reentry of air into the sample ampules between the end of the irradiation and the EPR measurements. From the results of a repetition of the study it was confirmed that the number of active centers remaining after heating to room temperature is considerable. It is assumed that the variation of the concentration of active centers as a function of time depends on the radiation intensity and the disappearance by monomolecular reaction of these centers. The yield of these centers at 77 deg K is G = 0.66 plus or minus 20%, in good agreement with previous results. (J.S.R.)
- Research Organization:
- Cie de St-Gobain, Antony, France; Ecole Normale Superieure, St- Cloud, France
- NSA Number:
- NSA-15-028105
- OSTI ID:
- 4843527
- Journal Information:
- Journal de Chimie Physique (France) Merged with Rev. Gen. Colloides to form J. Chim. Phys. Rev. Gen. Colloides, Journal Name: Journal de Chimie Physique (France) Merged with Rev. Gen. Colloides to form J. Chim. Phys. Rev. Gen. Colloides Vol. Vol: 58; ISSN JCPQA
- Country of Publication:
- Country unknown/Code not available
- Language:
- French
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