22MeV/u的Fe离子在PET膜中引起的辐照效应研究  

Irradiation Effects in PET Films Induced by 22 MeV/u Fe Ions

作　　者：王瑛[1] 朱智勇[1] 孙友梅[1] 金运范[1] 王志光[1] 侯明东[1] 段敬来[1] 

机构地区：[1]中国科学院近代物理研究所

出　　处：《原子核物理评论》2004年第1期43-47,共5页Nuclear Physics Review

基　　金：国家自然科学基金资助项目(10175084);中国科学院西部之光基金资助项目~~

摘　　要：用能量为22MeV/u的Fe离子在室温和真空条件下辐照了多层堆叠的半晶质聚酯膜,采用傅里叶转换红外吸收光谱、紫外/可见吸收光谱和X射线衍射技术分析测量了辐照后聚酯膜的微观结构所发生的变化,详细研究了分子结构的变化和非晶化转变与离子剂量、离子在样品中的平均电子能损以及吸收剂量的依赖关系.分析结果表明:辐照导致化学键的断裂、新化学键的形成和非晶化转变.非晶化效应和化学键的断裂随离子剂量和电子能损的增加而增大,但变化的总量仅依赖于总的吸收剂量,表明在所涉及的能损范围里,辐照产生的变化与辐照离子的种类和能量没有直接的关系,而只决定于材料对辐照离子能量的吸收程度.Semicrystalline polyethylene terephthalate (PET) film stacks were irradiated with 22 MeV/u Fe ions at room temperature under vacuum. Ion beam induced microscopic structural modifications and amorphous transformation were investigated by means of Fourier transform infrared spectrosocopy (FTIR), ultraviolet visible absorption spectrosocopy (UV/Vis) and X-ray diffractometer (XRD). It was found that the material underwent serious chemical degradation through bond breaking and formation of new bonds. Crystalline structure of the material was gradually destroyed with extending the amorphous region. Both the chemical degradation and amorphous transformation increase in amount with increase of ion fluence and electronic energy loss. But the total changes induced by the irradiation depend merely on the absorbed dose.

关 键 词：高能铁离子辐照 聚酯 化学降解 非晶化转变 傅里叶转换 平均电子能损 非晶化效应 化学键断裂 

分 类 号：O631.5[理学—高分子化学] O571.33[理学—化学]