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通过25MeV/u86Kr离子辐照叠层结晶聚对苯二甲酸乙二醇酯膜(PET),在不同的电子能损(3.407.25keV/nm)和离子注量(5×10113×1012ions/cm2)辐照条件下,对Kr离子在PET中引起的辐照损伤效应进行了研究。借助傅里叶变换红外光谱分析,通过对样品的红外吸收峰进行扣除基底后的Lorentz拟合,分析了与主要官能团对应的吸收峰强度的变化趋势,研究了化学结构与组分在重离子辐照下的变化规律;利用X射线衍射光谱仪测量,研究了Kr离子在PET潜径迹中引起的非晶化过程,并通过对吸光度和非晶化强度随离子注量的指数衰减规律的分析,获得了不同电子能损离子辐照PET时主要官能团的损伤截面和非晶化截面及对应的潜径迹半径。
Crystalline polyethylene terephthalate (PET) films were irradiated with different energy (3.407.25 keV / nm) and ion fluence (5 × 10113 × 1012 ions / cm2) by 25MeV / Irradiation under the conditions of Kr ions in the PET induced radiation damage effects were studied. By means of Fourier transform infrared spectroscopy (FTIR), the Lorentz fitting of the infrared absorption peak of the sample after subtracting the substrate was carried out to analyze the change trend of the intensity of the absorption peak corresponding to the main functional group, According to the change rule of Kr-ray diffraction, the amorphization process of Kr ions in the latent track of PET was studied. By analyzing the exponential decay law of absorbance and amorphization intensity with ion fluence, The damage cross sections and the amorphized cross sections of the main functional groups and corresponding submerged track radii were obtained when PET was irradiated by different electron-deactivatable ions.