利用循环伏安法、现场红外反射光谱法研究了电聚合的聚吡咯膜电极在电化学氧化还原过程中性质和结构的变化．结果表明，聚吡咯膜电极在电化学氧化还原过程中呈现薄层电极的特点．聚吡咯中每12个吡咯单元中有1个单元参加反应．当电位向正方向阶跃时，聚吡咯链中的共轭双键、C—N和N—H键的吸收峰增强，分子结构发生醌式变化． The cyclic voltammetry and field infrared reflectance spectroscopy were used to study the change of properties and structure of the electropolymerized polypyrrole film electrode during electrochemical redox process. The results show that polypyrrole film electrode exhibits the characteristics of thin electrode during electrochemical redox process. One of every 12 pyrrole units in the polypyrrole participates in the reaction. When the potential shifts to the positive direction, the conjugated double bonds in polypyrrole chains, the absorption peaks of C-N and N-H bonds increase, and the molecular structure changes quinoid.