电化聚合聚吡咯的角分布X射线光电子能谱研究

用角分布Ｘ射线光电子能谱（ＸＰＳ）测试和样品原位加热相结合的方法研究了阴离子是对甲苯磺酸根的电生导电聚吡咯的化学和聚集态结构．其结果表明聚吡咯表面约几个原子层内原子的相对浓度依下述次序递减：Ｃ＞Ｏ＞Ｓ＞Ｎ；导电聚吡咯中的氮原子至少有吡咯氮和氧化态氮两种；在２００℃加热以后聚合物链不受影响，但阴离子向表面迁移，同时氧化态氮大大减少．

ANGULAR DEPENDENT XPS STUDIES ON POLYPYRROLE FILMS PREPARED BY ELECTROCHEMICAL POLYMERIZATION

Angular dependent XPS technique combined with in situ heating method was used to study the chemical and aggregational structure of polypyrrole films prepared by electrochemical polymerization. The results show that the relative concentration for various atoms within the surface region decreases in the order of C >O>S> N.There are at least two inequivalent N heteroatoms,i.e.the pyrrole N and the oxidized pyrrole N atoms. The polypyrrole chains are not degraded by heating the polypyrrole films at 200℃ in vacuum. The anions, however, move to the top surface region during heating, and a decrease in the oxidized N heteroatoms is observed after heating.