A hierarchical multi-mode MSF model for long-chain branched polymer melts part II: multiaxial extensional flows

Esmaeil Narimissa*, Víctor H. Rolón-Garrido, Manfred H. Wagner

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

In part I, a novel hierarchical multi-mode molecular stress function (HMMSF) model for long-chain branched (LCB) polymer melts has been proposed, which implements the basic ideas of (i) the pom-pom model, (ii) hierarchal relaxation, (iii) dynamic dilution, and (iv) interchain pressure. Here, the capability of this approach is demonstrated in modelling the extensional viscosity data of a broadly distributed long-chain branched polymer melt in uniaxial, equibiaxial, and planar extensional deformations with only a single non-linear parameter, the dilution modulus, which quantifies the fraction of dynamically diluted chain segments.

Original languageEnglish
Pages (from-to)327-333
Number of pages7
JournalRheologica Acta
Volume55
Issue number4
DOIs
StatePublished - 1 Apr 2016
Externally publishedYes

Keywords

  • Biaxial flow
  • Elongational flow
  • Molecular stress function model
  • Multiaxial extensional flow
  • Polyethylene
  • Polymer melt

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