物理化学学报 >> 2001, Vol. 17 >> Issue (10): 904 -907 .doi: 10.3866/PKU.WHXB20011008

研究论文 上一篇    下一篇

苯胺自催化聚合反应的混合电位

廖川平;顾明元   

  1. 上海交通大学金属基复合材料国家重点实验室,上海 200030
  • 收稿日期:2001-04-20 修回日期:2001-05-30 发布日期:2001-10-15
  • 通讯作者: 顾明元 E-mail:mygu@mail.sjtu.edu.cn

Mixied-Potential for Autocatalytic Polymerization of Aniline

Liao Chuan-Ping;Gu Ming-Yuan   

  1. State Key Laboratory for Metal Matrix Composites, Shanghai Jiaotong University, Shanghai 200030
  • Received:2001-04-20 Revised:2001-05-30 Published:2001-10-15
  • Contact: Gu Ming-Yuan E-mail:mygu@mail.sjtu.edu.cn

摘要: 在苯胺自催化聚合反应的开路电位实验中,Pt、Pd和聚苯胺膜具有远正于其它金属的开路电位.该实验结果可以根据混合电位理论来解释.由于苯胺自催化聚合反应具有电化学机理,因此该反应的基底材料将具有同时对应于阳极半反应和阴极半反应的混合电极电位.混合电位在实验上表现为开路电位,其数值大小可以看作是苯胺自催化聚合反应能否进行的标志.有关开路电位的实验结果进一步证明了苯胺自催化聚合反应的电化学机理.

关键词: 苯胺, 聚苯胺, 自催化聚合, 混合电位

Abstract: Mixedpotential theory is introduced to discuss the experimental results of open circuit potential for the autocatalytic polymerization of aniline. The open circuit potentials of Pt, Pd and polyaniline film in acidic aniline solution are much more positive than those of other metals. Owing to the electrochemical mechanism of the autocatalytic polymerization of aniline, the metal plate as substrate is endowed with a common electrode potential as for both the anodic and the cathodic half reactions. This common potential is called mixed potential. The value of the mixed potential is experimentally equal to that of the open circuit potential, and can be regarded as a criterion for the feasibility of the autocatalytic polymerization of aniline. A much positive value of the open circuit potential corresponds to an observable autocatalytic polymerization of aniline. The experimental results of the open circuit potential of various metal plates in acidic aniline solution support the electrochemical mechanism of the autocatalytic polymerization of aniline in return.

Key words: Aniline, Polyaniline, Autocatalytic polymerization, Mixed potential