Korea-Australia Rheology Journal

The Korean Society of Rheology (한국유변학회)
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Polyethylene flow prediction with a differential multi-mode Pom-Pom model

  • Rutgers, R.P.G. (Department of Chemical Engineering, University of Queensland) ;
  • Clemeur, N. (Department of Chemical and Metallurgical Engineering, RMIT University) ;
  • Debbaut, B. (Polyflow s.a., Louvain-la-Neuve)
  • Published : 2002.03.01
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Abstract

We report the first steps of a collaborative project between the University of Queensland, Polyflow, Michelin, SK Chemicals, and RMIT University, on simulation, validation and application of a recently introduced constitutive model designed to describe branched polymers. Whereas much progress has been made on predicting the complex flow behaviour of many - in particular linear - polymers, it sometimes appears difficult to predict simultaneously shear thinning and extensional strain hardening behaviour using traditional constitutive models. Recently a new viscoelastic model based on molecular topology, was proposed by McLeish and carson (1998). We explore the predictive power of a differential multi-mode version of the porn-pom model for the flow behaviour of two commercial polymer melts: a (long-chain branched) low-density polyethylene (LDPE) and a (linear) high-density polyethylene (HDPE). The model responses are compared to elongational recovery experiments published by Langouche and Debbaut (19c99), and start-up of simple shear flow, stress relaxation after simple and reverse step strain experiments carried out in our laboratory.

Keywords

References

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