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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• 作者：M. T. Ramesan ; P. Jayakrishnan
• 关键词：Poly(vinyl cinnamte) ; Nickel oxide ; Conductivity ; Temperature dependence ; Conductivity modeling ; Transmission electron microscopy ; Magnetism
• 刊名：Journal of Inorganic and Organometallic Polymers and Materials
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：27
• 期：1
• 页码：143-153
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Inorganic Chemistry; Organic Chemistry; Polymer Sciences;
• 出版者：Springer US
• ISSN：1574-1451
• 卷排序：27

文摘

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.