CONDUCTING ISLANDS CONCEPT FOR HIGHLY CONDUCTIVE POLYANILINE - RECENTRESULTS OF TEM-MEASUREMENTS, X-RAY-DIFFRACTION-MEASUREMENTS, EPR-MEASUREMENTS, DC CONDUCTIVITY-MEASUREMENTS AND MAGNETIC SUSCEPTIBILITY-MEASUREMENTS

Polyaniline (PANI) is a prominent intrinsically conductive polymer, be cause of the unique combination of high conductivities and ease of pre paring the polymer itself and technological useable products like film s and fibres. Despite the commercial interest in PANI, it has also gai ned considerable interest by scientists. Central to their work are the charge carriers and the way in which they move in the anisotropic pol ymer structure. Recently, we succeeded in the preparation of TEM-pictu res of highly conducting PANI. which strongly support the conducting i sland concept for polyaniline, proposed by Epstein et al. The current work presents the results of detailed X-ray-diffraction, EPR-, tempera ture-dependent d.c. conductivity- and magnetic susceptibility-measurem ents, performed to obtain a full understanding or the structure of our PANI powder as it results from the TEM investigations.