Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés
J. Phys. IV France 03 (1993) C7-1569-C7-1572
Structure of doped polyaniline - dielectric spectroscopy measurementsR. DIAZ CALLEJA and E.S. MATVEEVA
Polytechnical University of Valencia, Camino de Vera, 46071 Valencia, Spain
The role of doping reagents (residual water and acid anions) in determining the electric properties of a chemically synthesized polyaniline (PANI) was studied using a dielectric spectroscopy method. Dependencies of dielectric losses and susceptibility of PANI as the functions of temperature (-100 ÷ +100°C) and electric field frequency (0.3 ÷ 30000 Hz) were examined at it was shown that water acts as a doping impurity similar to acid anions. The model is proposed to explain the role of water in terms of adsorption of H2O molecules at nitrogen cites of PANI chain and their dissociation.
© EDP Sciences 1993