Dielectric behavior of three phase polyimide percolative nanocomposites

Three phase ceramic–metal–plastic (cermetplas) percolative nanocomposite films were prepared using polyimide, as the matrix to prepare the composite films. Silver nanoparticles with a mean particle size of about 41 nm were prepared and used as the metal phase. Nanocomposites of barium titanate (BaTi...

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Published in:Journal of applied polymer science 2006-03, Vol.99 (6), p.3018-3022
Main Authors: Devaraju, Naga Gopi, Lee, Burtrand I.
Format: Article
Language:English
Subjects:
Applied sciences
Composites
dielectric properties
Exact sciences and technology
Forms of application and semi-finished materials
nanocomposites
percolation
polyimides
Polymer industry, paints, wood
silver nanoparticles
Technology of polymers
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description Three phase ceramic–metal–plastic (cermetplas) percolative nanocomposite films were prepared using polyimide, as the matrix to prepare the composite films. Silver nanoparticles with a mean particle size of about 41 nm were prepared and used as the metal phase. Nanocomposites of barium titanate (BaTiO3) particles in polyimide matrix, with silver as metallic inclusion, were formulated using effective medium theory and percolation theory. The concentration and frequency dependence of dielectric permittivity (ε) and loss tangent (tan δ) measurements were reported and discussed for cermetplas below the percolation threshold. Experimental results for cermetplas show that a ε of above 500 can be achieved below the percolation. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci, 2006
doi_str_mv 10.1002/app.22856
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subjects Applied sciences
Composites
dielectric properties
Exact sciences and technology
Forms of application and semi-finished materials
nanocomposites
percolation
polyimides
Polymer industry, paints, wood
silver nanoparticles
Technology of polymers
title Dielectric behavior of three phase polyimide percolative nanocomposites
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