From linear viscoelasticity to elongational flow of polydisperse linear and branched polymer melts: The hierarchical multi-mode molecular stress function model

Esmaeil Narimissa*, Manfred H. Wagner

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

We developed a novel Hierarchical Multi-mode Molecular Stress Function (HMMSF) model for polydisperse polymer melts, which implements the basic ideas of (i) hierarchical relaxation, (ii) dynamic dilution, and (iii) interchain tube pressure. Here, the capability of this approach is demonstrated by comparison of predictions of the HMMSF model with uniaxial extensional viscosity data of sixteen different grades of high and low density polyethylene melts, as well as two different polystyrene melts with defined topology. The modelling is solely based on the linear-viscoelastic relaxation modulus with only one non-linear material parameter, the dilution modulus.

Original languageEnglish
Pages (from-to)204-214
Number of pages11
JournalPolymer
Volume104
DOIs
StatePublished - 8 Nov 2016
Externally publishedYes

Keywords

  • Extensional modelling
  • HMMSF model
  • LCB polymers
  • Linear polymers
  • Molecular stress function theory
  • Polymer melt rheology

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