Studies of stretched predoped polyaniline films

The electrical conductivity of two isotropic 50% CSA doped polyaniline films were measured to be (300+/-30) S/cm. Four samples were cut from one isotropic film and drawn to various extensions at 150C. An additional four samples were cut from the other film and similarly drawn at 155C. The conductivity's parallel (sigma(parallel to)) and perpendicular (sigma(perpendicular to)) to the draw direction were then measured using a four-in-line probe. The most highly drawn film had an extension of 120% and gave sigma(parallel to) of(967+/-30) S/cm and sigma(perpendicular to) of (100+/-20) S/cm, an anisotropy of 9.67, the different draw temperatures had no effect on the conductivity measured. The conductivity enhancement is attributed to orientation of both the crystal and amorphous phases.