Melt Flow Behavior in Capillary Extrusion of Nanosized Calcium Carbonate Filled PLLA/PCL Bio-Composites

Ji Zhao Liang, Lin Zhou, Chak Yin Tang, Chi Pong Tsui

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)


Nanosized calcium carbonate (nano-CaCO3) filled poly-l-lactide (PLLA)/polycaprolactone (PCL) bio-composites were prepared by using a twin-screw extruder. The melt flow behavior of the composites, including the entry pressure drop, melt shear flow curves and melt shear viscosity were measured through a capillary rheometer operated at a temperature range of 170-200 °C and shear rates varying from 50 to 103s-1. The melt shear flow roughly followed the power law, while the effect of temperature on the melt shear viscosity might be estimated by using the Arrhenius equation. Moreover, the relationship between the PCL weight fraction and the melt shear viscosity for the PLLA/PCL/nano-CaCO3composite was described by a quadratic equation.
Original languageEnglish
Pages (from-to)857-863
Number of pages7
JournalJournal of Polymers and the Environment
Issue number3
Publication statusPublished - 1 Sep 2013


  • Bio-composites
  • Flow property
  • Melt extrusion
  • Nano-CaCO 3
  • PCL
  • PLLA

ASJC Scopus subject areas

  • Environmental Engineering
  • Polymers and Plastics
  • Materials Chemistry

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