AGING STUDIES ON POLYANILINE - CONDUCTIVITY AND THERMAL-STABILITY

The effect of aging on the transport properties of PANI-HCl was studie d as a function of the morphology and of the environmental conditions. DC conductivity sigma(dc) studies and spin dynamic methods (NMR and E SR) on aged polyaniline point to the fact that a large decay of the co nductivity takes place at a macroscopic scale whereas only a slight de crease of the intrachain conductivity sigma(intra) is seen at a micros copic level. Thermal studies under air and nitrogen atmospheres of pol yaniline doped with new families of dopant show an important enhanceme nt of the thermostability of protonated polyaniline.