The conductivity and its temperature and voltage dependence of polyani
line doped with various pH (pH 0-6.3) have been measured. It was found
that the temperature dependence of conductivity was more agreement wi
th Variable Range-Hopping model. The repeat length of conjugated chain
was estimated from Rosen and Pohl theory and is about 34 for 2A type
polyaniline. The temperature and frequency spectrum of complex dielect
ric permitivity of polyaniline without doping (pH 6.3) was reported fo
r the first time.