Abstract
Nanosized calcium carbonate (nano-CaCO3) 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 103s-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-CaCO3on the melt shear viscosity of the PCL composite was not significant at low filler levels.
Original language | English |
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Pages (from-to) | 149-154 |
Number of pages | 6 |
Journal | Polymer Testing |
Volume | 31 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1 Feb 2012 |
Keywords
- Bio-composites
- Flow property
- Melt extrusion
- Nano-CaCO 3
- PCL
ASJC Scopus subject areas
- Organic Chemistry
- Polymers and Plastics