Application of QCM technique in the kinetic study of polyaniline film formation in the presence of a constant (0.4Â T) magnetic field

The kinetics of PANI film formation was investigated in the presence of a constant (0.4 T) magnetic field (MF) by the quartz crystal microbalance (QCM) technique. The reaction exhibited half-order with respect to APS and first-order to aniline. The effects of temperature and different MF intensity on the film growth rate were investigated. The activation energy calculated from the temperature dependence of the growth rate was 38.36 kJ/mol. The growth rate increased with increasing magnetic intensity. The UV-visible spectra of the PANI polymerization was measured; the results showed that the reaction rate in the presence of a MF is higher than that of PANI polymerized in the absence of a MF at the same reaction time. It was suggested that the QCM technique can provide an efficient method for the kinetic study of polyaniline film formation in the presence of a MF.