Orientation and conductivity in polyaniline Part 2: Chloroform cast films

In this short communication we report the observation of inherent orientation in films of polyaniline doped with camphor sulfonic acid and cast from chloroform. The observed orthogonal wide-angle X-ray scattering (WAXS) patterns are best interpreted in terms of a preferential molecular alignment parallel to the plane of the film, but with no particular orientation within this plane. In comparison to m-cresol cast films this orientation is not as well developed and the molecular structure itself is markedly different with a much larger interchain spacing. This degradation in the molecular architecture is proposed to account partly for differences in the observed transport behaviour.