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Open AccessArticle

A Route for Polymer Nanocomposites with Engineered Electrical Conductivity and Percolation Threshold

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G.W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Rm 438MaRC, 813 Ferst Dr, Atlanta, GA 30306, USA
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Chemical Engineering and Materials Science Department, Michigan State University, East Lansing, MI 48824-1226, USA
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Composite Materials and Structures Center, 2100 Engineering Building, Michigan State University, East Lansing, MI 48824-1226, USA
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Author to whom correspondence should be addressed.
Materials 2010, 3(2), 1089-1103; https://doi.org/10.3390/ma3021089
Received: 17 January 2010 / Revised: 28 January 2010 / Accepted: 8 February 2010 / Published: 9 February 2010
(This article belongs to the Special Issue Nanocomposites of Polymers and Inorganic Particles)
Polymer nanocomposites with engineered electrical properties can be made by tuning the fabrication method, processing conditions and filler’s geometric and physical properties. This work focuses on investigating the effect of filler’s geometry (aspect ratio and shape), intrinsic electrical conductivity, alignment and dispersion within the polymer, and polymer crystallinity, on the percolation threshold and electrical conductivity of polypropylene based nanocomposites. The conductive reinforcements used are exfoliated graphite nanoplatelets, carbon black, vapor grown carbon fibers and polyacrylonitrile carbon fibers. The composites are made using melt mixing followed by injection molding. A coating method is also employed to improve the nanofiller’s dispersion within the polymer and compression molding is used to alter the nanofiller’s alignment. View Full-Text
Keywords: exfoliated graphite; carbon fibers; percolation threshold; processing exfoliated graphite; carbon fibers; percolation threshold; processing
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Kalaitzidou, K.; Fukushima, H.; Drzal, L.T. A Route for Polymer Nanocomposites with Engineered Electrical Conductivity and Percolation Threshold. Materials 2010, 3, 1089-1103.

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