Thermal behavior and rheological properties of PANI-DBSA/PAN blends

Abstract

Conducting blends of polyacrylonitrile (PAN) copolymer and dodecylbenzene sulfonic acid doped polyaniline (PANI-DBSA) were prepared by solution blending of the two components. By means of various characterization methods including differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), transmission electron microscopy (TEM) and cone-plate rheometry, the effects of PANI-DBSA content on the thermal behavior, morphological and rheological properties of the blends were investigated. A single and composition-dependent T _g was found for each of all blends and the thermal stability of PANI-DBSA/PAN was superior to that of both pure Co-PAN and PANIDBSA. Rheological results show that the apparent viscosity of blend solution decreased at low PANIDBSA content (2.5 wt%) while increased at high PANI-DBSA content (7.5wt%–10 wt%). Moreover, the shear-thinning appeared more distinctly with the incorporation of PANI-DBSA into the blend solutions especially at a high shear rate.

Keywords

polyaniline / polyacrylonitrile / blend / thermal behavior / rheological properties

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