Abstract
Poly (anthranilic acid) (PANA) nanocomposites containing different content of magnetite nanoparticles (Fe3O4) were synthesized by an in situ oxidation polymerization method. The formation of nanocomposites were characterized by UV–visible spectroscopy, FT-IR, XRD, HRTEM, FE-SEM, VSM, DSC, TGA and impedance analyzer. The UV spectra of the composite materials were shifted to a higher wavelength region with respect to parent polymer. The FT-IR spectrum of polymer composite shows the presence of characteristic absorption band of Fe–O at 586 cm−1. The XRD patterns indicated the decrease in the amorphous region of composite with the addition of nanoparticles. HRTEM and SEM images revealed that the nanoparticles were uniformly dispersed in the polymer network with spherically shaped particles. Magnetic property of nanocomposites show the super-paramagnetic behavior and the saturation of magnetism linearly increased with the content of nanoparticles. DSC results indicated that the glass transition temperature of nanocomposites were much higher than that of pure PANA. TGA studies of composite showed a significant increase in the thermal stability with increase in content of Fe3O4 particles. Both the AC conductivity and dielectric properties of nanocomposites were greater than pure PANA, and the maximum electrical properties were obtained for 15 wt% of composite.
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Acknowledgements
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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Jayakrishnan, P., Ramesan, M.T. Synthesis, structural, magnetoelectric and thermal properties of poly (anthranilic acid)/magnetite nanocomposites. Polym. Bull. 74, 3179–3198 (2017). https://doi.org/10.1007/s00289-016-1883-0
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DOI: https://doi.org/10.1007/s00289-016-1883-0