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Electrical and mechanical properties of melamine-formaldehyde-based laminates with shungite filler

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dc.title Electrical and mechanical properties of melamine-formaldehyde-based laminates with shungite filler en
dc.contributor.author Voigt, Björn L.
dc.contributor.author McQueen, Douglas
dc.contributor.author Pelíšková, Michaela
dc.contributor.author Rozhkova, Natalia
dc.relation.ispartof Polymer Composites
dc.identifier.issn 0272-8397 Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued 2005-08
utb.relation.volume 26
utb.relation.issue 4
dc.citation.spage 552
dc.citation.epage 562
dc.type article
dc.language.iso en
dc.publisher John Wiley & Sons, Inc. en
dc.identifier.doi 10.1002/pc.20113
dc.relation.uri http://onlinelibrary.wiley.com/doi/10.1002/pc.20113/abstract
dc.subject Anisotropy en
dc.subject Carbon black en
dc.subject Electric properties en
dc.subject Formaldehyde en
dc.subject Melamine en
dc.subject Thermosets en
dc.subject Thin films en
dc.subject Viscosity en
dc.subject Carbonaceous filler en
dc.subject Film stacking en
dc.subject Shungites en
dc.subject Thermosetting polymers en
dc.subject Laminates en
dc.description.abstract Processing issues and the electrical and mechanical properties of a novel combination of a natural carbonaceous filler, Karelian shungite, and a water soluble thermosetting polymer, melamine-formaldehyde, were investigated. Two types of shungite with different carbon contents were investigated and compared to a commercial carbon black. The larger particle size and chemically more active surface of the shungites compared to carbon black leads to easy handling with little dusting and allows water to be used as dispersant. Laminates of melamine-formaldehyde reinforced with random cellulose fibers and filler were prepared by film stacking. The layered structure results in anisotropic resistivities for the shungites with fairly low in-plane percolation thresholds and a dissipative resistivity above the percolation transition. In comparison, carbon black had a lower percolation threshold and a low isotropic resistivity above the percolation transition. The mechanical properties of the composites were slightly deteriorated by all three fillers, indicating poor interfacial adhesion. The results of Fourier transform infrared (FTIR) measurements are interpreted as indicating hydrogen bonding and thus relatively weak adhesion between filler and polymer. Aqueous mixtures of melamine-formaldehyde and shungite filler had lower viscosities than corresponding melamine-formaldehyde and carbon black filler mixtures. en
utb.faculty Faculty of Technology
dc.identifier.uri http://hdl.handle.net/10563/1002063
utb.identifier.scopus 2-s2.0-27644453964
utb.identifier.wok 000231252200015
utb.identifier.coden PCOMD
utb.source j-wok
dc.date.accessioned 2011-08-16T15:06:20Z
dc.date.available 2011-08-16T15:06:20Z
utb.contributor.internalauthor Pelíšková, Michaela
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