低能电子辐照对环氧树脂性能的影响

Effect of Low Energy Electron Irradiation on Properties of Epoxy Resin

为了研究低能电子辐照对环氧树脂的体积电阻率、邵氏硬度、拉伸强度和官能团结构的影响,本文在电子辐照能量为30 keV,注量率1×10 11 cm-2·s-1,总注量为1.6×10 14 cm-2,真空度10-6 Pa条件下,结合国家标准对辐照前、后环氧树脂材料的机械性能和结构进行表征。结果表明,辐照后环氧树脂材料的体积电阻率、邵氏硬度、拉伸强度等宏观物理性能均有下降。傅里叶红外光谱图显示环氧树脂主要官能团强度降低,产生的·H、·OH等自由基与聚合物分子上的羟基与氢结合。研究结果对环氧树脂材料在辐射环境中的使用具有重要意义。

Volume resistivity,shore hardness,tensile strength and functional group structure of the epoxy resin were studied under the low energy electron irradiation.Electron energy was 30 keV,flux rate was 1×10 11 cm-2·s-1,total flux was 1.6×10 14 cm-2 and vacuum degree was 10-6 Pa.The mechanical properties and structure of epoxy resin materials before and after irradiation were characterized by national standards.Macroscopic physical properties of epoxy resin such as volume resistivity,shore hardness and tensile strength were decreased after electron irradiation.Fourier infrared spectrum showed that the main functional group strength of epoxy resin was reducing.The generated radicals such as·H,·OH were combined with the hydroxyl groups and hydrogen on the polymer molecule.The results should be potentially important for the utilizing of epoxy resin in radiation environment.