A MODEL FOR PANI-HCL AGING

Ageing effect on PANI-HCl have been analyzed through transport propert ies and structural studies. Results are quantitatively interpreted in a model where PANI-HCl appears as an heterogeneous material in which c onducting islands are separated by insulating barriers. Ageing seems t o act by a nibbling of conducting islands leading to a insulating aged material with a struture similar to PANI-EB. Elemental analyses and F TIR characterization link this picture with chemical degradations (oxi dation, chemical crosslinking, dedoping and ring chlorination).