Melt flow behavior of polypropylene composites filled with multi-walled carbon nanotubes during extrusion

J. Z. Liang, C. Y. Chen, S. Y. Zou, Chi Pong Tsui, Chak Yin Tang, S. D. Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

22 Citations (Scopus)

Abstract

Polypropylene (PP) composites filled with multi-walled carbon nanotubes (MWCNTs) were prepared using a twin-screw extruder. The melt flow properties of the composites were measured with a capillary rheometer in a temperature range from 180 to 230 °C and at various apparent shear rates varying from 100 to 4000 s-1. The results showed that the melt shear stress increased almost linearly while the melt shear viscosity decreased almost linearly with increasing shear rates in a bi-logarithmic coordinate system. The melt shear flow followed the power law relationship and the dependence of the melt shear viscosity on temperature obeyed the Arrhenius equation. The relationship between the melt shear viscosity and the MWCNT weight fraction was roughly linear under the investigated range of temperature or shear rate.
Original languageEnglish
Pages (from-to)41-46
Number of pages6
JournalPolymer Testing
Volume45
DOIs
Publication statusPublished - 30 May 2015

Keywords

  • Extrusion
  • Polymer-matrix composites
  • Resin flow
  • Rheological properties

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics

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