Abstract
Polypyrrole/Nickel Zinc Iron oxide(NiZnFe2O4) nanocomposites were synthesized by in-situ polymerization using Ammonium Persulphate as oxidising agent. These nanocomposites were synthesized by mixing polypyrrole and NiZnFe2O4 in different Weight percentages by varying the level of additive material NiZnFe2O4. Dielectric and conductivity behaviours of Polymer nanocomposites of various composition were investigated using impedance spectroscopy at different temperatures in the frequency range (100Hz – 5MHz). The dielectric properties of host polymer matrix have been improved by the addition of nanoparticles and are found to be highly temperature dependent. Both Dielectric constant and Dielectric loss decreased with increase in frequency for all composites, indicating a normal behaviour of dielectrics It was noticed that Nanocomposites of 50 Wt% have highest conductivity when compared to pure polypyrrole and nanocomposites of other Wt percentage. The conductivity values show weak frequency dependence at low frequencies but shows strong frequency dependence at high frequencies. Significant increase in ac conductivities in the nanocomposite makes them a potential candidate for application in electronic devices, electromagnetic shielding.etc.,
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