Chuhong Yu, Jing Peng, Jiuqiang Li
Nov 1, 2012
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Influential Citations
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Journal
Radiation Physics and Chemistry
Abstract
Abstract Dicyclohexano-18-crown-6 (DCH18C6) aqueous solution was irradiated using 60 Co source and precipitates containing yellow transparent blocks (PA) and powders (PB) were obtained. TGA analysis confirms that both PA and PB have higher thermal stability than DCH18C6. Both DSC and GPC results suggest that PA might be oligomer and PB were ultrahigh molecular weight polymers. The FTIR spectra indicate that both PA and PB have similar chemical structures containing carboxyl and hydroxyl groups. By using scavengers, it was found that the formation of PA and PB is attributed to the radiation-induced radical polymerization of DCH18C6, and ·OH radical produced by water radiolysis might be a critical species for the formation of PA and PB. These studies help to understand the radiation chemistry behavior of DCH18C6 in the reprocessing of nuclear fuel.