Growth Mechanism of Polypyrrole through Electrochemical Polymerization

Abstract

It is important to reveal the growth mechanism of the conductive polymer upon electrochemical polymerization in order to control the morphology of the film as a shape of the conductive polymer. In this paper, the relation between the structure of the polypyrrole as the conductive polymer and the quantity of electricity during galvanostatic polymerization was studied with the microscopic observation. With the quantity of electricity in the current density of 0.75 to 7.5 A·m⁻², a particle of polypyrrole grew up to 15 µm in size at maximum while the thickness of the polypyrrole film was increased accompanying a stagnant behaviour around 25 µm to some extent, indicating increase in packing density of the polypyrrole particles.