Journal of Applied Polymer Science · 2005 · 28 citations · 14 references
Natural SciencesMaterials EngineeringMaterials ScienceElectromagneticsPolymer EngineeringPolymer MaterialsComposite MaterialsElectrical ConductivityFiber PropertiesPolymer ShieldingPolymer-matrix CompositesShielding MaterialsComposite Shielding MaterialsElectrical Percolation ThresholdLaminated Composite MaterialsLoadingsPercolationPolymer Composite ShieldingPolymer Composite Shielding MaterialsShielding Efficiency
Abstract We have formulated a linear theory for the shielding effectiveness of composite matrix materials and have tested the theory for various amounts of ThermalGraph DKD X carbon fiber within nylon 6,6. The theory predicts that the most important parameters for the shielding effectiveness of a sample are the carbon‐fiber volume percentage and the frequency of the wave to be shielded. Although we expected the model to be valid at low filler‐loading levels, it actually performs remarkably, covering an electrical‐resistivity range of 10 16 (at low filler‐loading levels) to 10 1 Ω cm (at high filler‐loading levels), well above the percolation threshold of electrical‐resistivity theory. The model performs much better than those reported in the literature and can be used to determine filler loadings needed to provide a certain level of shielding of electromagnetic waves. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 96: 62–69, 2005
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