Title: EMI SHIELDING EFFECTIVENESS OF COPPER/EPOXY COMPOSITES
Page Range: p.657-68
Author(s): Wetherhold R C; McManaman J M
File size: 271K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 13
Issue No: No. 7
Abstract
The EMI shielding effectiveness of copper reinforced epoxy composites is testing using samples of different shaped, sized and treated specimens. A small amount of nickel powder was including in some specimens to evaluate the effect of magnetic permeability on the shielding effectiveness (SE). Results showed that a smaller fibre diameter resulted in significant SE improvements. SE was also substantially by relatively minor fibre shaping or by fine-scale roughening via chemical treatment. Improvements in SE were also achieved with essentially identical mechanical properties, leading to an effective multifunctional material. The addition of nickel powder led to in an overall improvement in SE as well as a cyclic dependence of SE frequency, which is reported to indicate phase interference at a scale of particle size not previously seen. 26 refs.
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