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The free radical species in polyacrylonitrile fibers induced by gamma-radiation and their decay behaviors
Liu, WH(刘伟华); Wang, MH(王谋华); Xing, Z(邢哲); Wu, GZ(吴国忠)
2012
Source PublicationRADIATION PHYSICS AND CHEMISTRY
ISSN0969-806X
Volume81Issue:7
AbstractFree radicals in vacuum, air and oxygen atmospheres were studied using electron spin resonance (ESR). Mainly two types of radicals, namely alkyl radicals and polyimine radicals, are formed in polyacrylonitrile (PAN) fibers after gamma-ray irradiation. The G value of the radical formation was calculated to be 2.1 (number of radicals per 100 eV absorbed) in air at room temperature based on the ESR measurements. The radical stability and decay behaviors at room temperature and elevated temperatures were also investigated under different atmospheres. The alkyl radicals were found to be rather stable when stored in vacuum at room temperature, but they decayed via reaction with oxygen when stored in air. The alkyl radicals disappeared completely after a thermal treatment at 110 degrees C in vacuum, but only 15% of the polyimine radicals decayed; this indicates that polyimine radicals are more stable compared to the alkyl radicals due to their lower mobility. (C) 2012 Elsevier Ltd. All rights reserved.
Language英语
Funding Project应物所项目组
WOS IDWOS:000305656800021
Citation statistics
Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/13319
Collection中科院上海应用物理研究所2011-2019年
Recommended Citation
GB/T 7714
Liu, WH,Wang, MH,Xing, Z,et al. The free radical species in polyacrylonitrile fibers induced by gamma-radiation and their decay behaviors[J]. RADIATION PHYSICS AND CHEMISTRY,2012,81(7).
APA Liu, WH,Wang, MH,Xing, Z,&Wu, GZ.(2012).The free radical species in polyacrylonitrile fibers induced by gamma-radiation and their decay behaviors.RADIATION PHYSICS AND CHEMISTRY,81(7).
MLA Liu, WH,et al."The free radical species in polyacrylonitrile fibers induced by gamma-radiation and their decay behaviors".RADIATION PHYSICS AND CHEMISTRY 81.7(2012).
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