摘要
研究了辐照剂量、辐照剂量率和辐照气体环境等因素对聚四氟乙烯(Polytetrafluoroethene,PTFE)薄膜电子束辐射降解效应的影响,并采用傅里叶变换红外(Fourier Transform Infrared Spectroscopy,FTIR)、电子自旋共振(Electron Spin Resonance,ESR)和X射线衍射(X-ray Diffraction,XRD)等方法进行分析。结果表明:电子束能够有效地对聚四氟乙烯进行降解。PTFE样品的辐射降解主要发生在主链C-C键上;在相同的吸收剂量和气体环境下辐照,低剂量率辐照样品降解好于高剂量率样品;而在相同的吸收剂量和剂量率下辐照,在空气中的辐照降解效果好于N2气环境下。
Background： The effect of irradiation degradation of polytetrafluoroethylene （PTFE） was studied in recent years. Most of irradiation source is 60Co. Purpose： The effect of electron beam irradiation on the degradation of PTFE in different atmosphere and dose rate was investigated in this study. Methods： The irradiated PTFE samples were analyzed by Fourier transform infrared spectroscopy （FTIR）, electron spin resonance （ESR） and X-ray diffraction （XRD）. Results： It is found that the PTFE samples were degraded by electron beam effectively. Conclusion： The radiation decomposition of the sample is mainly the rupture of C-C bond. The samples irradiated in low dose rate are better effective than the samples in high dose rate in the same absorbed dose and gas atmosphere, and the samples＇ degradation in air is superior to the samples in N2 when they are in the same absorbed dose and radiation dose rate.
出处
《核技术》
CAS
CSCD
北大核心
2015年第1期7-11,共5页
Nuclear Techniques
关键词
聚四氟乙烯
电子束辐照
降解
Polytetrafluoroethylene （PTFE）, Electron beam irradiation, Degradation
