FT-IR Spectroscopy and SEM-EDX Studies on Nano Copper Doped Conducting Polymer

Abstract

Polypyrrole (PPy) based metal composites have obtained considerable attention due to its fascinating properties such as appreciable electronic conductivity. This study is based on the system, pure polypyrrole (PPy) and nano copper doped polypyrrole (n-CuPPy) which were prepared by chemical oxidative polymerization method. The properties of PPy and n-CuPPy have been investigated by FT-IR,SEM-EDX and conductivity measurements. The FT-IR spectra showed the presence of all characteristics absorption peaks of PPy that is 881cm-1(=C-H out of plane vibration),1043cm-1(=C-H in plane vibration), 1182cm-1 (N-C strech vibration ) and 1552cm-1 (pyrrole ring vibration). The morphological structures and semi quantification of elements present in the pure and nano copper doped composite have been analysed using Scanning Electron Microscope with Energy Dispersive X-ray Spectroscopy. The conductivity measurements have been measured using two probe technique. We compare the conductivities of pure PPy with nanocomposite. The conductivity of n-CuPPy is 2x10-3 S/cm and PPy is 2.5x10-5 S/cm. The conductivity of n-CuPPy have been increased by two order when compared with PPy. The increase in conductivity in composite materials than PPy is due to the incorporation of nano copper particles into the PPy matrix.