Structural investigation of the effect of aging on conducting polyanilines

Powders of HCl protonated polyaniline (HCl-PAni) and films of camphor sulfo nic acid protonated polyaniline (CSA-PAni) were heated at constant temperat ure in air. The different samples have been studied by X-ray diffraction an alysis in order to characterize the effect of aging procedure on the crysta lline structure of these materials. A monotonic transition between two phas es can characterize the structural evolution of HCl-PAni powdered samples. By contrast, the structure of the CSA-PAni films is evolving through severa l steps as a function of the aging time.