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ISRN Polymer Science
Volume 2012 (2012), Article ID 359034, 9 pages
http://dx.doi.org/10.5402/2012/359034
Research Article

Electrical Behaviors of Flame Retardant Huntite and Hydromagnesite Reinforced Polymer Composites

1Department of Metallurgical and Materials Engineering, Dokuz Eylül University, Tınaztepe Campus, 35160 Izmir, Turkey
2Center for Fabrication and Applications of Electronic Materials (EMUM), Dokuz Eylül University, Tınaztepe Campus, 35160 Izmir, Turkey

Received 2 August 2012; Accepted 28 August 2012

Academic Editors: A. F. Halasa and A. Mousa

Copyright © 2012 Hüsnügül Yılmaz Atay and Erdal Çelik. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In our previous work, we studied the physical characteristics (particle size, surface treatment, etc.) of huntite/hydromagnesite mineral in order to be employed as a flame retardant filler. With this respect, electrical properties of the mineral reinforced polymeric composites were investigated in this study. After grinding of huntite/hydromagnesite mineral to the particle size of 10 μm, 1 μm, and 0.1 μm, phase and microstructural analyses were undertaken using X-ray diffraction (XRD) and scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS). The ground minerals with different particle size and content levels were subsequently added to ethylene vinyl acetate copolymer (EVA) to produce composite materials. After fabrication of huntite/hydromagnesite reinforced plastic composite samples, they were characterized by using Fourier transform infrared (FTIR) and SEM-EDS. Electrical properties were measured as a main objective of this paper with Alpha-N high resolution dielectric analyzer as a function of particle size and loading level. Dielectric constant, dissipation factor, specific resistance, and conductivity of the composite materials were measured as a function of frequency. On the other hand, conductivity of Ag-coated and uncoated polymeric composite materials was measured. It was concluded that the electrical properties of plastic composites were improved with reducing the mineral particle size.