离子辐照聚合物薄膜引起的降解和能量传输过程

Degradation and energy transport of polymer induced by ion irradiation

用１２０ｋｅＶＮ＋、Ａｒ＋、Ｆｅ＋辐照聚酰亚胺薄膜，辐照剂量为５×１０１４—１×１０１７ｉｏｎｓ／ｃｍ２。对辐照样品做了表面电阻和光学吸收测量，结果表明：辐照后样品的表面电阻有明显变化，且随辐照剂量变化呈现阈值，在高剂量下达到饱和值．在不同辐照剂量和深度下用ＸＰＳ和ＲＢＳ方法测量了样品原子浓度和化学结构的变化，研究了辐照引起化学结构变化和表面改性间的内在联系，讨论了离子能量沉积过程．

Kapton films have been modified by ion implantation. Ions of N+, Ar+ and Fg+with energy of 120keV and doses ranging from 5 × 1014 to 1 × 1017 ions/cm2 were used to the implantation . The sheet resistivity and optical absorption of modified samples were measured. Electrical conductivity of pristine has been greatly enhanced after the ion implantation . The surface microscopic structure and compositional changes that accompanied these electrical enhancements were observed using X-ray photoemission spectroscopy (XPS) and Rutherford backscattering spectroscopy(RBS).The effect of electronic excitation energy loss on molecular degradation induced by inn irradiation was Peeved to plsy an important role.