CHANGES IN VISCOELASTICITY OF POLYANILINE DURING ELECTROCHEMICAL DEPOSITION IN COMMON ACID SOLUTIONS

摘要

Changes in viscoelasticity of polyaniline during electrochemical deposition was investigated in several common acid solutions by means of in situ electrochemical quartz crystal oscillator method. Electrochemical growth rate of polyaniline was in the order of H_2SO_4 > HNO_3 > HBr > HCl > HClO_4 ~ H_3PO_4 ~ CF_3COOH. Both resonant frequency and resonant resistance changed during electropolymerization of aniline in all acid solutions investigated, indicating that polyaniline grew viscoelastic on electrode surfaces. Polyaniline formed in sulfuric acid solutions was the largest in inelasticity.