Free-Radical Concentrations and Other Properties of Pile-Irradiated Coals

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Science  25 Dec 1959:
Vol. 130, Issue 3391, pp. 1762-1763
DOI: 10.1126/science.130.3391.1762


Five coals reacted quite differently when they were exposed to pileirradiation. Little or no change was found in free-radical content for the three coals of lowest carbon content, whereas the two coals of highest carbon content were found to have a considerable increase in free-radical content. The infrared spectra and the apparent hardness of the irradiated coals of higher carbon content indicate that polymerization occurred. Radiation of these coals in chemical reagents may promote reactivity.