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Temperature dependence of the viscosity of highly starch-filled poly(hydroxy ester ether) biodegradable composites

Authors
  • Zhou, Genwen1
  • Willett, Julious L.1
  • Carriere, Craig J.2
  • 1 Plant Polymer Research Unit National Center for Agricultural Utilization Research, USDA-ARS 1815 N. University St., Peoria, IL 61604 e-mail: [email protected]
  • 2 Biomaterials Processing Research Unit National Center for Agricultural Utilization Research, USDA-ARS 1815 N. University St., Peoria, IL 61604
Type
Published Article
Journal
Rheologica Acta
Publisher
Springer-Verlag
Publication Date
Nov 01, 2000
Volume
39
Issue
6
Pages
601–606
Identifiers
DOI: 10.1007/s003970000096
Source
Springer Nature
Keywords
License
Yellow

Abstract

The temperature dependence of the viscosity of starch-filled poly(hydroxy ester ether) (PHEE) biodegradable composites was analyzed using Arrhenius and WLF equations. Corn starch/PHEE materials were extruded using a twin screw extruder with starch volume fractions from 0.27 to 0.66. Dynamic strain sweep measurements were carried out at 10 rad/s at six different temperatures from 100 °C to 150 °C. Both Arrhenius and WLF equations model equally well the temperature effect on viscosity of PHEE and starch/PHEE composites with starch volume fractions up to 0.36. Arrhenius equation with stress correction describes the stress dependence of viscosity of starch/PHEE composites with higher starch volume fractions. The activation energy using both Arrhenius equation and Arrhenius equation with stress correction is 62.7 kJ/mol for pure PHEE and starch/PHEE composites.

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