【摘要】 氟树脂 F2 314在真空、空气、氮气三种气氛中经γ射线辐照后发生了降解反应 ,产生的气体及其水溶液经 GC- MS、离子选择性电极分析 ,发现生成的 HF、HCl的量随剂量的增大而增大。真空和氮气气氛中有 H2 产生 ,H2 的量随剂量的变化不明显 ,空气气氛中未检测出 H2 。空气气氛中产生的 CO2 的量随剂量的增大而增大 ,真空和氮气气氛中未检出 CO2 。辐照后的样品经 IR分析发现有 - CF= CH-、- CF=CF-基团 ,空气气氛中还产生了 =C=O基团更多还原

【Abstract】 Fluororesin F2314 was irradiated with gamma rays in vacuum, air and nitrogen res pectively, and radiation degradation took place during this process. The gaseous products of F2314 radiolysis including H 2?CO 2?HF and HCl were determinded by GC-MS directly, or by Ion selected electrode (ISE) in solution. The content of HF and HCl increased with dose in each condition, the same trend of CO 2 of irradiation in air was investigated, and there was no CO 2 in nitrogen and vac uum. The content of H 2 hardly had any changes with dose, although it was detec ted when irradiated in vacuum and nitrogen but not in air. Beside the =C=O group formed by radiolysis in air, -CF=CH- and -CF=CF- groups were also identified fo r all specimens after radiolysis with IR.更多还原