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This version was published on November 1, 2007
Journal of Reinforced Plastics and Composites, Vol. 26, No. 16, 1705-1712 (2007)
DOI: 10.1177/0731684407081437
© 2007 SAGE Publications

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

P. Slobodian

Faculty of Technology, Tomas Bata University in Zlín T.G.M. 275, 762 72 Zlín, Czech Republic, slobodian{at}ft.utb.cz

A. Lengálová

Faculty of Technology, Tomas Bata University in Zlín T.G.M. 275, 762 72 Zlín, Czech Republic

Petr Sáha

Faculty of Technology, Tomas Bata University in Zlín T.G.M. 275, 762 72 Zlín, Czech Republic

M. Slouf

Institute of Macromolecular Chemistry, ASCR, v.v.i, Heyrovsky sq. 2 16206 Praha 6, Czech Republic

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.


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