Percolation behavior and mehanical properties of polycarbonate composites filled with carbon black/carbon nanotube systems

P. Pötschke; M. H. Arnaldo; H.-J. Radusch

Published : 2012-03-30

Vol. 57 No. 3 (2012)

Percolation behavior and mehanical properties of polycarbonate composites filled with carbon black/carbon nanotube systems

P. Pötschke M. H. Arnaldo H.-J. Radusch

Abstract

The effect of a mixed filler system consisting of carbon black (CB) and multi-walled carbon nanotubes (MWCNTs) on electrical, rheological and mechanical properties of melt compounded composites with polycarbonate (PC)was investigated. Pure CB orMWCNTs or mixtures of CB and MWCNTs in mass ratio 50/50 or 75/25 were added to PC using a small scale DACA Micro-Compounder in order to get the filler concentration between 0.5 and 5 wt. %. Comparison of the theoretical percolation concentration for composites with the mixed filler systems with corresponding experimental values allows to state that no synergistic effect occurs. SEM and TEM investigations on thin sections showed a good distribution of quite small CB aggregates and good dispersion of the MWCNTs in composites. Rheological properties of the melted composites are more influenced by MWCNTs than by CB content. The stress-strain behavior of the composites compared at loadings leading to a composite conductivity of 10-4 S/cm is the best for composites filled with MWCNTs and better for that with mixed filler systems than for composites with CB only

Keywords

nanorurki węglowe ; poliwęglan ; nanokompozyt ; dyspersja ; przewodność elektryczna ; właściwości reologiczne stopu ; charakterystyka naprężeniowo-odkształceniowa carbon nanotubes ; polycarbonate ; nanocomposite ; dispersion ; electrical conductivity ; melt rheological properties ; stress-strain behavior

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Pötschke, P., Arnaldo, M. H., & Radusch, H.-J. (2012). Percolation behavior and mehanical properties of polycarbonate composites filled with carbon black/carbon nanotube systems. Polimery, 57(3), 204–211. Retrieved from https://ichp.vot.pl/index.php/p/article/view/819

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