Journal
MACROMOLECULAR MATERIALS AND ENGINEERING
Volume 294, Issue 11, Pages 749-755Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/mame.200900151
Keywords
annealing; carbon nanotubes; conductive polymer composite; nanocomposite; orientation; polymer fibre; percolation threshold
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A new concept is described for the creation of multifunctional polymer nanocomposite tapes (or fibres) that combines high stiffness and strength with good electrical properties and a low percolation threshold of carbon nanotubes (CNTs). The concept is based on a bicomponent tape (or fibre) construction consisting of a highly oriented polymer core and a conductive polymer composite (CPC) skin based on a polymer with a lower melting temperature than the core, enabling thermal annealing of these skins to improve conductivity through a dynamic percolation process while retaining the properties of the core and hence those of the tape (or fibre). The percolation threshold in the CPC skins of the highly drawn conductive bicomponent tapes could be decreased from 5.3 to 1.1 wt.-% after annealing.
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