Abstract
Polyaniline was prepared by the oxidative polymerisation of aniline with ammonium peroxydisulfate in the presence of various acids. Both inorganic and organic acids have been included. Amorphous and semi-crystalline polyanilines have been obtained by polymerisations at 20 °C and −50 °C, respectively. The conductivity of polyaniline pellets has been measured in situ during their thermal ageing at 173 ± 1 °C and the observed differences in the electrical stability are discussed. The best stability of conductivity at elevated temperature was achieved with samples protonated with methanesulfonic or hydrofluoric acid.
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