Comparative studies of Conducting Behavior of Various Polymers

Abstract

Present paper is to study the conductivity of various polymeric materials specially,

Polyaniline and its complexes and plyethyl aniline with its metal complexes and poly methyl aniline and its complex materials. With the help of polarographic curves and cyclovoltammograms obtained using pulse polarograph, this paper is prepared and result so obtained is discussed hereby. On gradual increase of the Polyaniline  concentration the half wave potential of the metal ion like Zn (II )or Al(III) shifted to more negative value in each case and the diffusion current also decreased ,thereby indicating complex formation of the metal ions with Polyaniline is an important conducting polymer because of its good environmental stability. Its conductivity on complexation is arousing considerable commercial interests. Unlike other conducting polymers Polyaniline (PANI) has a unique feature as a conductor in acidic and insulator in the basic medium. Lingane Treatment of the observed polarographic data showed 1:1 metal: Polymer complex formation in each case with formation constants for Zn(II)-Polymer equal to log B=0.2787and log B=4.50,respectively. To find out the number of electrons involved in the electrode process cyclic voltammetric studies have been performed. Various sets of solutions containing varying concentrations of each of the polymers in 0.1 M potassium chloride(over all concentration) were prepared and the pH was adjusted to 8.0±0.1and scan rate was 40mVs-1, similar sets were prepared. Containing varying concentration of the polymer complexes under study. Cyclic voltammograms of these sets were recorded on pulse polarograph CL-90. PolyEthylAniline complexes generally have a multiple nature, consisting of salt rich crystalline phase and amorphous phase with dissolved salts.