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The effect of carbon nanotube concentration on the physical properties of CNT-polycarbonate composites

M. M. LARIJANI1,* , E. J. KHAMSE1,2, J. DAVOODI2, F. ZIAIE1, S. SAFA1, K. ARBABI1, M. A. TAGHAVIZADEH3

Affiliation

  1. Agricultural Medical and Industrial Research School, Nuclear Science and Technology Research Institute (NSTRI), Karaj, Iran
  2. Department of Science, Zanjan University, Zanjan, Iran
  3. Radiation Processing School, NSTRI, Iran

Abstract

Effects of incorporation of multi-walled carbon nanotubes (MWCNTs) as filler into polycarbonate (PC) on the optical, mechanical and electrical properties of MWCNT/PC nanocomposites are presented. The electrical results were achieved using four point probe technique suggesting that two percolation thresholds could coexist in a nanocomposite based on thermoplastic matrix as the insulator like thermoset ones. The conductivity change is more significant in the higher one than the lower one. Detailed calculations at concentrations above the second threshold show a better scaling law dependence of the conductivity on the filler load (with an exponent of 3.7) than its below level (with an exponent of 1.09)..

Keywords

Carbon nanotubes, Polymer–matrix composites (PMCs), Electrical properties.

Citation

M. M. LARIJANI, E. J. KHAMSE, J. DAVOODI, F. ZIAIE, S. SAFA, K. ARBABI, M. A. TAGHAVIZADEH, The effect of carbon nanotube concentration on the physical properties of CNT-polycarbonate composites, Optoelectronics and Advanced Materials - Rapid Communications, 5, 3, March 2011, pp.252-257 (2011).

Submitted at: Dec. 7, 2010

Accepted at: March 16, 2011