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PAN-based carbon fibers/PMMA composites: thermal, dielectric, and DC electrical properties

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Abstract

The study deals with thermal, dielectric, and DC electrical properties of polyacrylonitrile (PAN)-based carbon fibers/poly(methyl methacrylate) composites. The polymer composites contain 0, 5, 10, 20 and 30 wt.% PAN-based carbon fibers. The thermal conductivity was studied as a function of filler content and temperature. It was found that the thermal conductivity is enhanced by addition of carbon fibers concentration and temperature. The dielectric properties were determined using impedance measurements. The results showed that the dielectric constant and dielectric loss are decreased with frequency, and increased with both temperature and fibers content. The DC electrical conductivity, temperature coefficient of resistance, and activation energy were studied as a function of fibers concentration in the temperature ranges 30–110 °C. It was found that the composites exhibit negative temperature coefficient of resistivity and enhancement of electrical conductivity with increasing temperature and carbon fibers concentration. The observed increase in the DC conductivity was explained according to the approach of conductive paths and connections between the carbon fibers.

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Acknowledgments

The authors thank Dr. G. Ragosta for composites preparation in CNR-Napoli-Italy.

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Authors and Affiliations

  1. Department of Applied Science, Faculty of Engineering Technology, Al-Balqa’ Applied University, Amman, Jordan

    Z. M. Elimat

  2. Physics Department, The University of Jordan, Amman, Jordan

    W. T. Hussain & A. M. Zihlif

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  1. Z. M. Elimat
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  2. W. T. Hussain
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  3. A. M. Zihlif
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Correspondence to A. M. Zihlif.

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Elimat, Z.M., Hussain, W.T. & Zihlif, A.M. PAN-based carbon fibers/PMMA composites: thermal, dielectric, and DC electrical properties. J Mater Sci: Mater Electron 23, 2117–2122 (2012). https://doi.org/10.1007/s10854-012-0712-y

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  • DOI: https://doi.org/10.1007/s10854-012-0712-y

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