Synthesis, characterisation and thermal study of composite of polyaniline doped with multiligand urea complex of cobalt(II)

Abstract

In the present communication, doping of polyaniline (PANI) has been carried out with multiligand urea complex of cobalt(II) via in situ oxidative polymerisation by ammonium persulphate. The dopant has been synthesised and characterised using elemental analysis, Fourier transform infrared (FTIR), X-ray diffraction (XRD) and thermogravimetric (TG) analysis. The composite based on the synthesised dopant has been subjected to FTIR and XRD techniques. Thermal analysis has been performed using TG and differential scanning calorimetry technique. Viscosity average molar mass has been determined by viscosity method using Ostawald’s viscometer and Mark–Houwink–Sakurada polymer equation. Various parameters like crystallite size, interplanar distance, microstrain and dislocation density have been calculated using Bragg’s and other related equations. Moreover, lattice parameters a, b, c, α, β and γ have also been calculated for the dopant as well as the composite using powder X software. Thermal stability of PANI composite is better than that of pure PANI.

Keywords:

• Composite
• Polyaniline
• Thermal stability
• X-ray diffraction

Acknowledgements

The authors are thankful to the Directors of Sophisticated Analytical Instrumentation Facility, Punjab University, and Central Scientific Instruments Organisation Chandigarh for providing instrumentation facilities.