SIOC English
化学学报
高级检索

化学学报 ›› 1983, Vol. 41 ›› Issue (11): 1038-1043. 上一篇    下一篇

研究论文

γ-辐照聚全氟乙丙烯的电子自旋共振研究 II: 真空中俘获自由基的自氧化过程

薛鸿庆;钱军   

  1. 上海市测试技术研究所;中国科学院上海原子核研究所
  • 发布日期:1983-11-15

ESR studies on γ-irradiated tetrafluoroethylene- hexafluoropropylene copolymer II: Autooxidation process of free radicals trapped in vacuum at room temperature

XUE HONGQING;QIAN JUN   

  • Published:1983-11-15

PDF

401

关键词: 氧化, 反应动力学, 浓度, 扩散系数, 游离基, 电子自旋共振, 全氟乙丙烯共聚物, γ辐射

Autooxidation processes of free radicals trapped in γ irradiated F46 copolymer in vacuum at room temperature were studied by means of ESR. It is shown that these processes are under the dual control of both the diffusion of oxygen and the total concentration of free radicals, and they are independent of the autooxidation reaction rate constant. In general, the diffusion constant calculated by simple diffusion equation is an apparent diffusion constant, it is a function of the total concentration of free radicals. Only when the total concentration of free radicals is low enough (in our case n

Key words: OXIDATION, REACTION KINETICS, CONCENTRATION, DIFFUSION COEFFICIENTS, FREE RADICAL, ELECTRON SPIN RESONANCE, FLUORINATED ETHYLENE-PROPYLENE COPOLYMERS, GAMMA RADIATION

中图分类号: