Abstract: Conducting composites of polyacrylonitrile(PAN) copolymer containing 10% mass fraction methylacrylate and dodecylbenzene sulfonic acid doped polyaniline(PANI-DBSA) were prepared by solution blending of the two components. The electrical properties of the blends were characterized by means of electrical conductivity measurements and the phase structures were investigated via scanning electron microscopy(SEM), X-ray diffraction(XRD), FTIR spectroscopy and different scanning calorimetry(DSC). DSC measurements showed that there was only one T g for each blend and the values of T g varied with the change of the PANI-DBSA content. This implies that the PANI-DBSA/PAN blend is at least partially compatible. The formation of the hydrogen bonding between the carbonyl groups in PAN copolymer and the imines groups in PANI-DBSA was identified by the FTIR spectra. XRD demonstrated that the intrinsic layered arrangement of PANI-DBSA was destroyed in the blends. Nanosize network structure of PANI-DBSA dispersed in PAN matrix and the so-called phase reverse occurring in the skin layer of the film samples at low PANI-DBSA loading were observed by SEM. {

Key words: Polyaniline}, Polyacrylonitrile, Composite blends, Compatibility, Phase stracture, Conducti, {vity}