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Fabrication and characterization of poly(methyl methacrylate)/CaCu3Ti4O12 composites

Thomas, P and Ravindran, Ernest RS and Varma, KBR (2014) Fabrication and characterization of poly(methyl methacrylate)/CaCu3Ti4O12 composites. In: POLYMER ENGINEERING AND SCIENCE, 54 (3). pp. 551-558.

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Official URL: http://dx.doi.org/10.1002/pen.23586


Composites comprising Poly(Methyl Methacrylate) (PMMA) and CaCu3Ti4O12 (CCTO) via melt mixing followed by hot pressing were fabricated. These were characterized using X-ray diffraction, thermo gravimetric, scanning electron microscopy, and Impedance analyzer for their structural, morphology, and dielectric properties. Composites were found to have better thermal stability than that of pure PMMA. The composite, with 38 Vol % of CCTO (in PMMA), exhibited remarkably low dielectric loss at high frequencies and the low frequency relaxation is attributed to the space charge polarization/MWS effect. Theoretical models were employed to rationalize the dielectric behavior of these composites. At higher temperatures, the relaxation peak shifts to higher frequencies, due to the merging of both beta and alpha relaxations into a single dielectric dispersion peak. The AC conductivity in the high frequency region was attributed to the electronic polarization. POLYM. ENG. SCI., 54:551-558, 2014. (c) 2013 Society of Plastics Engineers

Item Type: Journal Article
Additional Information: Copyright for this article belongs to the WILEY-BLACKWELL, NJ USA
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 22 Apr 2014 05:23
Last Modified: 22 Apr 2014 05:29
URI: http://eprints.iisc.ac.in/id/eprint/48847

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