Two-Dimensional Texture of Intrinsic Conductive Poly(styrene-co-maleanilic Acid) Grafted with Polyaniline: Formation and Conductivity

Intrinsically conducting polyaniline is grafted onto a preformed poly(styrene-co-maleanilic acid) copolymer backbone via chemical oxidative coupling of aniline in acidified chloroform/water emulsion. The structure and textural morphology of the grafted poly(S-co-MA-g-PANI) are examined by different spectroscopic, thermal, powder X-ray diffraction and scanning electron microscopic techniques. The d.c. electrical conductivity of the grafted emeraldine base of the obtained materials displays a d.c. conductivity of the order of 10−7 – 10−9 Scm−1, which is ∼2 orders of magnitude greater than that of the reported PANI-EB homopolymer. This enhancement in d.c. conductivity is explained in terms of microstructure-electronic conductivity relationship.