Rheologica Acta

, Volume 38, Issue 1, pp 48–64

Rheological characterisation of a high-density polyethylene with a multi-mode differential viscoelastic model and numerical simulation of transient elongational recovery experiments

  • F. Langouche
  • B. Debbaut
ORIGINAL CONTRIBUTION

Abstract

The rheological characterisation of a high-density polyethylene is performed by means of measurements of the storage and loss moduli, the shear viscosity and the transient uniaxial elongational viscosity, the latter being obtained with the Meissner extensional rheometer. The rheological behaviour of the polymeric material is described by means of a multi-mode Phan Thien-Tanner fluid model, the parameters of which are successively fitted on the basis of the linear and non-linear properties. By using a semi-analytical technique and the finite element method, numerical investigations are performed for the shape recovery of the sample, and the predictions are compared with their experimental counterparts. Surface tension effects are also explored. We discuss the agreement between the experiments and the simulation results.

Key words High-density polyethylene Elongational viscosity Recovery Multi-mode differential viscoelastic model Numerical simulation 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • F. Langouche
    • 1
  • B. Debbaut
    • 2
  1. 1.Solvay & Co, LC-MEP 1 310 Rue de Ransbeek B-1120 Bruxolles, BelgiumBE
  2. 2.Polyflow s.a., 16 Place de l'Université B-1348 Louvain-la-Neuve, BelgiumBE

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