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Role of Nickel Oxide Nanoparticles on Magnetic, Thermal and Temperature Dependent Electrical Conductivity of Novel Poly(vinyl cinnamate) Based Nanocomposites: Applicability of Different Conductivity Models

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Abstract

Nanocomposites of poly(vinyl cinnamate) (PVCin) with various concentration of nickel oxide (NiO) nanoparticles were prepared by in situ polymerization method. The effect of metal oxide particles on the structural, magnetic and thermal stability was analyzed by a high resolution transmission electron microscope (HRTEM), X-ray diffraction (XRD), vibrating sample magnetometer (VSM), and thermogravimetric analysis (TGA) measurements. The electrical properties such as room temperature DC conductivity and temperature dependent AC conductivity were investigated with respect to different loading of NiO nanoparticles. XRD and HRTEM images showed the uniform arrangement of nanoparticles inside the macromolecular chain of PVCin. The VSM studies of nanocomposites indicated the hysteresis loops of the ferromagnetic behavior. The saturation of magnetization and coercivity values were varied with the content of NiO nanoparticles. From TGA analysis the composite attain better thermal stability than polyvinyl cinnamate and the thermal stability increases with increase in concentration of nanoparticles. The electrical conductivity of nanocomposite was increased with increase in temperature and also with the loading of nanoparticles. The activation energy values calculated from the AC conductivity was found to be decreases with increase in temperature in all compositions. AC and DC conductivity of nanocomposites were much greater than pure PVCin and the maximum conductivity values were obtained for 10 wt% of composite. Different theoretical equations based on Scarisbrick, McCullough and Bueche model were used to compare the experimentally determined conductivity with theoretical conductivities.

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Acknowledgments

The authors wish to thank Prof. P. P. Pradyumnan, Department of Physics, University of Calicut, and Prof. P. Pradeep, Department of Physics, NIT Calicut, for providing necessary facilities in the department.

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Ramesan, M.T., Jayakrishnan, P. Role of Nickel Oxide Nanoparticles on Magnetic, Thermal and Temperature Dependent Electrical Conductivity of Novel Poly(vinyl cinnamate) Based Nanocomposites: Applicability of Different Conductivity Models. J Inorg Organomet Polym 27, 143–153 (2017). https://doi.org/10.1007/s10904-016-0456-x

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  • DOI: https://doi.org/10.1007/s10904-016-0456-x

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