Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/23562
Title: Melt flow behavior in capillary extrusion of nanometer calcium carbonate filled PCL bio-composites
Authors: Liang, JZ
Zhou, L
Tang, CY 
Tsui, CP 
Li, FJ
Keywords: Bio-composites
Flow property
Melt extrusion
Nano-CaCO 3
PCL
Issue Date: 2012
Publisher: Elsevier
Source: Polymer testing, 2012, v. 31, no. 1, p. 149-154 How to cite?
Journal: Polymer testing 
Abstract: Nanosized calcium carbonate (nano-CaCO 3) filled 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 in a temperature range of 170∼200 °C and shear rates varying from 50 to 10 3 s -1. The entry pressure drop showed a non-linear increase with increasing shear stress when the filler weight fraction was less than 3%, while it decreased slightly with an increase of shear stress at a filler weight fraction of 4%. The melt shear flow roughly followed a power law, while the effect of temperature on the melt shear viscosity was estimated by using the Arrhenius equation. Moreover, the influence of the nano-CaCO 3 on the melt shear viscosity of the PCL composite was not significant at low filler levels.
URI: http://hdl.handle.net/10397/23562
ISSN: 0142-9418
DOI: 10.1016/j.polymertesting.2011.10.006
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