Abstract
The magnetic and transport properties of polyacetylene electrochemically oxidized in the presence of perchlorate ion have been determined. Room temperature dc conductivity is unaffected by doping between 
. A rapid conductivity increase occurs with increasing dopant level having a midpoint of transition at 
. By comparison, the change in thermopower vs. 
is sharper taking place within a tenfold increase in 
with a midpoint at 
. The unparied spin concentrations remain constant as dopant concentration increases before the onset of a Dysonian lineshape at 
. The results are interpreted as the melting of a glassy carrier state causing the sharp change of transport properties. A phase separation into metallic domains occurs at 
. Side reactions involving the electrolyte complicate the electrochemistry of polyacetylene.