• Ajekwene K K
• Jelmy E J
• Thomas Kurian

Polyaniline (PANI) in nano dimension was prepared in the presence of aqueous hydrochloric acid (HCl) or toluene sulfonic acid (TSA) as doping agent and ammonium persulfate (APS) as oxidizing agent by chemical oxidative polymerization at room temperature. The morphology, microstructure and thermal decomposition behavior of the PANI materials were investigated by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), x-ray diffractometry (XRD), uv-visible spectroscopy, differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). FTIR analysis confirmed the formation of PANI and change in polymer structure due to the different doping agents. The dc electrical conductivity of the PANI was measured by four-probe technique. The electrical conductivities of the two PANI samples show that nano-structured PANI doped with TSA has higher conductivity of 0.824 Scm-1 compared to PANI doped with HCl with the value of 0.478 Scm-1. The nano-structured PANI doped with TSA is slightly thermally more stable compared to the one doped with HCl.

Chemical oxidative polymerization; nano-structured polyaniline; thermal stability; electrical conductivity

"PREPARATION, CHARACTERIZATION, THERMAL BEHAVIOUR AND DC CONDUCTIVITY OF NANO-STRUCTURED POLYANILINE DOPED WITH HCL OR TSA: A COMPARATIVE ANALYSIS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 9, page no.294-299, October-2018, Available :http://www.jetir.org/papers/JETIRA006370.pdf

"PREPARATION, CHARACTERIZATION, THERMAL BEHAVIOUR AND DC CONDUCTIVITY OF NANO-STRUCTURED POLYANILINE DOPED WITH HCL OR TSA: A COMPARATIVE ANALYSIS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 9, page no. pp294-299, October-2018, Available at : http://www.jetir.org/papers/JETIRA006370.pdf