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Rheological characterization of melt processed polycarbonate-multiwalled carbon nanotube composites

Authors
Journal
Journal of Non-Newtonian Fluid Mechanics
0377-0257
Publisher
Elsevier
Publication Date
Volume
128
Issue
1
Identifiers
DOI: 10.1016/j.jnnfm.2005.01.008
Keywords
  • Polycarbonate
  • Multiwalled Carbon Nanotube
  • Nanocomposite
  • Melt Rheology

Abstract

Abstract In this study polycarbonate/multiwalled carbon nanotube composites were produced with different compositions by diluting a masterbatch using melt mixing in a DACA-Micro-Compounder. The composites were rheologically characterized using an ARES-rheometer in the dynamic mode under nitrogen atmosphere at 280 °C and frequency varying from 100 to 0.056 rad/s. The results showed that the dynamic moduli and the viscosity increased with increasing MWNT content. At a concentration of 0.5 wt.% MWNT, a significant change in the frequency dependence of the moduli was observed which indicates a transition from a liquid like to a solid like behavior of the nanocomposites. This transition can be related to the formation of a combined network between the nanotubes and the polymer chains.

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