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Journal of Reinforced Plastics and Composites
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Article

Poly(methyl methacrylate)/Multi-wall Carbon Nanotubes Composites Prepared by Solvent Cast Technique: Composites Electrical Percolation Threshold

Petr Slobodian1*, Miroslav Slouf1, Anezka Lengalova1, and Petr Saha2

1 Faculty of Technology, Tomas Bata University in Zlín T.G.M. 275, 762 72 Zlín, Czech Republic
2 Institute of Macromolecular Chemistry, ASCR, v.v.i, Heyrovsky sq. 2 16206 Praha 6, Czech Republic

* To whom correspondence should be addressed.


  Abstract

Polymer composites based on poly(methyl metacrylate)/multi-wall carbon nanotubes, (PMMA/MWNT), were prepared by the solvent cast technique from dispersions of MWNT in PMMA solutions. Three different solvents like toluene, chloroform and acetone were selected to solve PMMA, covering a broad range of Hansen solubility parameters. Composite mixing was done by sonication of solutions with MWNT in a broad concentration range up to 20 wt.% of MWNT. Electrical conductivity of composites as a function of MWNT concentration was measured. The different percolation thresholds were found for used systems like PMMA/solvent/MWNT which were found to be related to values of Hansen solubility parameters. Increasing the dispersion component, together with lower values of polar and hydrogen bonding components, leads to a lower value of percolation threshold.

Key Words: carbon nanotubes, MWNT, polymer composites, electrical percolation threshold, Hansen solubility parameters

First published on August 29, 2007, doi:10.1177/0731684407081437

Journal of Reinforced Plastics and Composites 2007;26:1705.

A more recent version of this article appeared on November 1, 2007

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