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Carbon-Nanofibre-Filled Thermoplastic Composites

Published online by Cambridge University Press:  15 March 2011

Jan Sandler
Affiliation:
Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge, CB2 3QZ, UK
MiloS.P. Shaffer
Affiliation:
Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge, CB2 3QZ, UK
Yeng-Ming Lam
Affiliation:
Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge, CB2 3QZ, UK
Alan H. Windle
Affiliation:
Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge, CB2 3QZ, UK
Philipp Werner
Affiliation:
Polymer Engineering, University of Bayreuth, Universitätsstraße 30, D-95440 Bayreuth, Germany
Volker Altstädt
Affiliation:
Polymer Engineering, University of Bayreuth, Universitätsstraße 30, D-95440 Bayreuth, Germany
Jacek Nastalczyk
Affiliation:
Polymer Composites, Technical University Hamburg-Harburg, Denickestraße 15, D-21073 Hamburg, Germany
Georg Broza
Affiliation:
Polymer Composites, Technical University Hamburg-Harburg, Denickestraße 15, D-21073 Hamburg, Germany
Karl Schulte
Affiliation:
Polymer Composites, Technical University Hamburg-Harburg, Denickestraße 15, D-21073 Hamburg, Germany
Christian-André Keun
Affiliation:
NYH AG, Nartenstraße 12, D-21079 Hamburg, Germany
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Abstract

Macroscopic poly(ether ether ketone) (PEEK) and polypropylene (PP) nanocomposites containing vapour-grown carbon nanofibres (CNF) were produced using standard polymer processing. Tensile tests revealed a linear increase in composite stiffness with nanofibre content. A detailed DSC study verified that under standard processing conditions the degree of crystallinity and the crystalline structure of these semicrystalline thermoplastics were not affected by the nanofibres. Nevertheless, we provide evidence that the nanoscale filler can alter the polymer morphology under certain conditions, an effect which needs to be considered when evaluating nanocomposite properties. Given the absence of morphological changes in the standard nanocomposites we were able to calculate the intrinsic nanofibre modulus using short fibre theory; both distinctively different matrix systems show a similar effective nanofibre modulus.

Type
Article
Copyright
Copyright © Materials Research Society 2002

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