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Melt-Mixed 3D Hierarchical Graphene/Polypropylene Nanocomposites with Low Electrical Percolation Threshold

Gkourmpis, Thomas (author)
Borealis GmbH
Gaska, Karolina, 1986 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Tranchida, Davide (author)
Borealis GmbH
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Gitsas, Antonis (author)
Borealis GmbH
Müller, Christian, 1980 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Matic, Aleksandar, 1968 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Kádár, Roland, 1982 (author)
Chalmers tekniska högskola,Chalmers University of Technology
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 (creator_code:org_t)
2019-12-11
2019
English.
In: Nanomaterials. - : MDPI AG. - 2079-4991. ; 9:12
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Graphene-based materials are a family of carbonaceous structures that can be produced using a variety of processes either from graphite or other precursors. These materials are typically a few layered sheets of graphene in the form of platelets and maintain some of the properties of pristine graphene (such as two-dimensional platelet shape, aspect ratio, and graphitic bonding). In this work we present melt mixed graphene-based polypropylene systems with significantly reduced percolation threshold. Traditionally melt-mixed systems suffer from poor dispersion that leads to high electrical percolation values. In contrast in our work, graphene was added into an isotactic polypropylene matrix, achieving an electrical percolation threshold of similar to 1 wt.%. This indicates that the filler dispersion process has been highly efficient, something that leads to the suppression of the beta phase that have a strong influence on the crystallization behavior and subsequent thermal and mechanical performance. The electrical percolation values obtained are comparable with reported solution mixed systems, despite the use of simple melt mixing protocols and the lack of any pre or post-treatment of the final compositions. The latter is of particular importance as the preparation method used in this work is industrially relevant and is readily scalable.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Kemiteknik -- Polymerteknologi (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Chemical Engineering -- Polymer Technologies (hsv//eng)
NATURVETENSKAP  -- Kemi -- Materialkemi (hsv//swe)
NATURAL SCIENCES  -- Chemical Sciences -- Materials Chemistry (hsv//eng)
NATURVETENSKAP  -- Fysik -- Annan fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Other Physics Topics (hsv//eng)
TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Annan materialteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Other Materials Engineering (hsv//eng)

Keyword

electrical conductivity
graphene
polypropylene
electrical percolation
melt mixing
nanocomposites

Publication and Content Type

art (subject category)
ref (subject category)

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