Electrical and mechanical properties of melamine-formaldehyde-based laminates with shungite filler
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 c...
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ftunivzlinpubl:oai:publikace.k.utb.cz:10563/1002063 2023-07-16T03:59:21+02:00 Electrical and mechanical properties of melamine-formaldehyde-based laminates with shungite filler Voigt, Björn L. McQueen, Douglas Pelíšková, Michaela Rozhkova, Natalia 2005-08 http://publikace.k.utb.cz/handle/10563/1002063 en eng John Wiley & Sons, Inc. http://onlinelibrary.wiley.com/doi/10.1002/pc.20113/abstract Polymer Composites http://publikace.k.utb.cz/handle/10563/1002063 Polymer Composites Anisotropy Carbon black Electric properties Formaldehyde Melamine Thermosets Thin films Viscosity Carbonaceous filler Film stacking Shungites Thermosetting polymers Laminates article 2005 ftunivzlinpubl 2023-06-25T07:40:00Z 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. Article in Journal/Newspaper karelian Tomas Bata University Zlin: TBU publications |
institution |
Open Polar |
collection |
Tomas Bata University Zlin: TBU publications |
op_collection_id |
ftunivzlinpubl |
language |
English |
topic |
Anisotropy Carbon black Electric properties Formaldehyde Melamine Thermosets Thin films Viscosity Carbonaceous filler Film stacking Shungites Thermosetting polymers Laminates |
spellingShingle |
Anisotropy Carbon black Electric properties Formaldehyde Melamine Thermosets Thin films Viscosity Carbonaceous filler Film stacking Shungites Thermosetting polymers Laminates Voigt, Björn L. McQueen, Douglas Pelíšková, Michaela Rozhkova, Natalia Electrical and mechanical properties of melamine-formaldehyde-based laminates with shungite filler |
topic_facet |
Anisotropy Carbon black Electric properties Formaldehyde Melamine Thermosets Thin films Viscosity Carbonaceous filler Film stacking Shungites Thermosetting polymers Laminates |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Voigt, Björn L. McQueen, Douglas Pelíšková, Michaela Rozhkova, Natalia |
author_facet |
Voigt, Björn L. McQueen, Douglas Pelíšková, Michaela Rozhkova, Natalia |
author_sort |
Voigt, Björn L. |
title |
Electrical and mechanical properties of melamine-formaldehyde-based laminates with shungite filler |
title_short |
Electrical and mechanical properties of melamine-formaldehyde-based laminates with shungite filler |
title_full |
Electrical and mechanical properties of melamine-formaldehyde-based laminates with shungite filler |
title_fullStr |
Electrical and mechanical properties of melamine-formaldehyde-based laminates with shungite filler |
title_full_unstemmed |
Electrical and mechanical properties of melamine-formaldehyde-based laminates with shungite filler |
title_sort |
electrical and mechanical properties of melamine-formaldehyde-based laminates with shungite filler |
publisher |
John Wiley & Sons, Inc. |
publishDate |
2005 |
url |
http://publikace.k.utb.cz/handle/10563/1002063 |
genre |
karelian |
genre_facet |
karelian |
op_source |
Polymer Composites |
op_relation |
http://onlinelibrary.wiley.com/doi/10.1002/pc.20113/abstract Polymer Composites http://publikace.k.utb.cz/handle/10563/1002063 |
_version_ |
1771547001914130432 |