Via improved chemistry we have increased the maximum attainable conduc
tivity in oriented polyaniline. D.C. conductivity's approaching 10(4)
Scm(-1) have been measured. Temperature dependent transport measuremen
ts reveal that our new polyaniline behaves in a similar fashion to hig
h conductivity polyacetylene and can be modelled in the same way. Howe
ver we do observe strongly temperature dependent electrical anisotropy
below a characteristic temperature of ca. 150 K Thermopower measureme
nts indicate that the system is metallic in the parallel direction but
also, we find that the thermopower is anisotropic. Thermopower in the
perpendicular direction changes sign at around 200 K. This we take to
indicate that the interchain conduction process involves phonons, and
hence a different transport mechanism must control it as compared to
the metallic intrachain transport.