Cyclic potential sweep electro polymerization of aniline and substituted aniline in acidic medium: A kinetic study

The cyclic potential sweep (CPS) was applied to aniline and substituted aniline to study the kinetic aspects and mechanism of polymerization of anilines, the dependence of the deposition rate of aromatic amines (i.e., deposition charge on number of cycles, scan rate and concentration of monomer). In this method, the mass of polymer deposited at electrode is a function of anodic peak current that is recorded during the polymerization. The deposition rates of polymer were thus controlled by the increase in the anodic peak currents at various concentrations of aniline. The second order kinetics was observed for overall electropolymerization reaction. A kinetic rate expression, Rp = k' [ANI] + k [PANI] [ANI] was obtained for the polymerization, supports the probable mechanism and the structure of the growing polymer formed at the electrode.