Melt flow behavior in capillary extrusion of nanometer calcium carbonate filled PCL bio-composites

Ji Zhao Liang; Lin Zhou; Chak Yin Tang; Chi Pong Tsui; Feng Jiao Li

doi:10.1016/j.polymertesting.2011.10.006

Melt flow behavior in capillary extrusion of nanometer calcium carbonate filled PCL bio-composites

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

Research output: Journal article publication › Journal article › Academic research › peer-review

28 Citations (Scopus)

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
Pages (from-to)	149-154
Number of pages	6
Journal	Polymer Testing
Volume	31
Issue number	1
DOIs	https://doi.org/10.1016/j.polymertesting.2011.10.006
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

More information

10.1016/j.polymertesting.2011.10.006

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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.",

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AU - Tsui, Chi Pong

AU - Li, Feng Jiao

PY - 2012/2/1

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KW - Bio-composites

KW - Flow property

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KW - Nano-CaCO 3

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Melt flow behavior in capillary extrusion of nanometer calcium carbonate filled PCL bio-composites

Abstract

Keywords

ASJC Scopus subject areas

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