典型文献
Free-radical evolution and decay in cross-linked polytetrafluoroethylene irradiated by gamma-rays
文献摘要：
Electron spin resonance techniques were employed to investigate the effects of the absorbed dose and post-irradiation conditions on the evolution and decay of free-radicals in cross-linked polytetrafluoroethylene(XPTFE),induced by γ-ray radiation.Chain-end free-rad-icals,chain alkyl free-radicals,and tertiary alkyl free-rad-icals were detected when XPTFE was irradiated under Ar atmosphere.The corresponding peroxy free-radicals were formed upon exposure of irradiated XPTFE to air;the free-radicals concentration first increased linearly with increasing absorbed dose and then gradually saturated.The free-radicals yield under air atmosphere was greater than that under Ar,and the peroxy free-radicals were preserved for a relatively long time when irradiated XPTFE was stored under air atmosphere.The chain alkyl free-radicals may be converted to chain end free-radicals by β-scission,while chain end free-radicals are more sensitive to oxygen than chain alkyl free-radicals.When the annealing tem-perature was raised above the α-transition temperature of XPTFE,the decay of the free-radicals was greatly affected and accelerated by the motion of the molecules over the long range.
文献关键词：
中图分类号：
作者姓名：
Fei-Xiang Sha;Guo-Jun Cheng;Zi-Yue Xuan;Yang Liu;Wei-Hua Liu;Xiao-Dong Zhang;Zhong-Feng Tang
作者机构：
School of Materials Science and Engineering,Anhui University of Science and Technology,Huainan 232000,China;Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China;University of Chinese Academy of Sciences,Beijing 100049,China;National Key Laboratory of Materials Behavior and Evaluation Technology in Space Environment,Harbin Institute of Technology,Harbin 150001,China
文献出处：
引用格式：
[1]Fei-Xiang Sha;Guo-Jun Cheng;Zi-Yue Xuan;Yang Liu;Wei-Hua Liu;Xiao-Dong Zhang;Zhong-Feng Tang-.Free-radical evolution and decay in cross-linked polytetrafluoroethylene irradiated by gamma-rays)[J].核技术（英文版）,2022(05):113-125
A类：
XPTFE,icals
B类：
Free,evolution,decay,cross,linked,polytetrafluoroethylene,irradiated,by,gamma,rays,Electron,spin,resonance,techniques,were,employed,investigate,effects,absorbed,dose,post,irradiation,conditions,free,radicals,induced,Chain,end,chain,alkyl,tertiary,detected,when,was,under,Ar,atmosphere,corresponding,peroxy,formed,upon,exposure,air,concentration,first,increased,linearly,increasing,then,gradually,saturated,yield,greater,than,that,preserved,relatively,long,stored,may,converted,scission,while,are,more,sensitive,oxygen,When,annealing,raised,above,transition,temperature,greatly,affected,accelerated,motion,molecules,over,range
AB值：
0.435076
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机标中图分类号，由域田数据科技根据网络公开资料自动分析生成，仅供学习研究参考。
