PANI-CSA FILMS - AGING AND KINETICS OF CONDUCTIVITY DEGRADATIONS

Ageing of PANI-CSA films has been studied through conductivity decay k inetics obtained within 358 and 446K. For short ageing time, the condu ctivity loss is partly reversible. For longer one, first order kinetic s is observed. This process is arrhenian-like, with an activation ener gy linked to the PANI quality. Extrapolation at RT predicts stability over centuries. Studies conducted on different atmospheres and FTIR ch aracterization correlate the conductivity decay with various chemical degradations (oxidation, chemical crosslinking, dedoping and ring sulf onation mechanisms).