Materials Research Bulletin, Vol.41, No.7, 1364-1369, 2006
Dielectric spectroscopy of polypyrrole-gamma-Fe2O3 composites
In situ polymerization of pyrrole was carried out in the presence of gamma-Fe2O3 (FE) to synthesize polypyrrole-gamma-Fe2O3 composites (PPy/FE) by chemical oxidation method. The PPy/FE composites have been synthesized with various compositions viz., 10, 20, 30, 40 and 50 wt.% of gamma-Fe2O3 in pyrrole. The AC conductivity was studied in the frequency range 10(2)-10(7) Hz. The dielectric behaviour was also investigated in the frequency range 10(2)-10(7) Hz. The dimensions of gamma-Fe2O3 particles in the matrix have a greater influence on the conductivity values and the observed dielectric values. (C) 2006 Elsevier Ltd. All rights reserved.
Keywords:composites