Rheology of wood plastics melt, part 3: NonLinear nature of the flow

T. Q. Li, Michael P Wolcott

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

The nonlinear rheology of HDPE/maple melt in both shear and extensional flow was studied using a rotational parallel plate rheometer and the hyperbolic die technique, respectively. Nonlinear features were found in oscillatory shear tests at strain levels far below the values for neat polymer melt. The shear stress relaxation tests revealed the time-strain factorizability, and the damping function was found to follow the sigmoidal-type relation. The nonlinear nature of the shear flow was further observed as the shear stress growth function from step rate tests as compared to the prediction based on linear viscoelasticity. Extensional stress growth functions of the filled HDPE was build through the viscosity data based on hyperbolic dies with different Hencky strain. The comparison with prediction based on linear viscoelasticity and the Trouton's law further indicated significant damping owing to the particulate suspension nature of the wood plastics melts.

Original languageEnglish (US)
Pages (from-to)114-121
Number of pages8
JournalPolymer Engineering and Science
Volume46
Issue number1
DOIs
StatePublished - Jan 1 2006

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Rheology
Wood
Viscoelasticity
Polyethylene
High density polyethylenes
Plastics
Shear stress
Damping
Polymer melts
Rheometers
Stress relaxation
Shear flow
Suspensions
Viscosity

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Li, T. Q. ; Wolcott, Michael P. / Rheology of wood plastics melt, part 3 : NonLinear nature of the flow. In: Polymer Engineering and Science. 2006 ; Vol. 46, No. 1. pp. 114-121.
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Rheology of wood plastics melt, part 3 : NonLinear nature of the flow. / Li, T. Q.; Wolcott, Michael P.

In: Polymer Engineering and Science, Vol. 46, No. 1, 01.01.2006, p. 114-121.

Research output: Contribution to journalArticle

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