Volume : III, Issue : XI, November - 2013

Electrical Conductivity Studies on Para Toluene Sulphonic Acid Doped Polyaniline

Ratheesh R. , Viswanathan K

Abstract :

Polyaniline doped with hydrochloric acid (HCl) was prepared by chemical oxidative polymerization of aniline (ANI) in aqueous medium with ammonium peroxy disulphate as an oxidant. In the presence of oxygen, aniline undergoes polymerization rapidly and leads to the formation of scum like product. The deprotonation of the PANI:HCl samples were performed by stirring the PANI:HCl powder (emeraldine salt) in 0.1 M aqueous solution of ammonium hydroxide for 24 hours at room temperature, thus obtaining the polymer in the emeraldine base form. The redoping of the PANI (emeraldine base) with para toluene sulphonic acid was performed by mixing emeraldine base (EB) with para toluene sulphonic acid (PTSA) using a glass mortar and pestle to obtain the required doping levels (Y = 0.5,Y =0.3,Y =0.1). The prepared samples were pressed into pellets, and DC electrical conductivity was measured, using four–probe, with increasing temperature. The temperature dependence of electrical conductivity with increase in temperature followed Arrhenius equation. The electrical conductivity was observed around 10–2 S cm–1 for PANI– (PTSA)0.5, 10–3 S cm–1 for PANI– (PTSA)0.3 and 10–5 S cm–1 for PANI– (PTSA)0.1 respectively at 35 °C.

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Article: Download PDF   DOI : 10.36106/ijar  

Cite This Article:

Ratheesh R, Viswanathan K / Electrical Conductivity Studies on Para Toluene Sulphonic Acid Doped Polyaniline / Indian Journal of Applied Research, Vol.3, Issue.11 November 2013

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