Nonlinear viscoelastic response of thermoplastic-elastomer melts

Aleksey D. Drozdov, Erik A. Jensen, Jesper Christiansen deClaville

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Observations are reported on thermoplastic elastomer (ethylene-octene copolymer) melt in small-amplitude shear oscillatory tests and start-up shear tests with various strain rates in the interval of temperatures between 120 and 210 °C. Based on the concept of heterogeneous non-affine polymer networks, constitutive equations are developed for the thermo-mechanical behavior of a melt at threedimensional deformations with finite strains. Adjustable parameters in the stress-strain relations are found by fitting the experimental data. The model is applied to the analysis of Poiseuille flow. The effects of temperature and pressure gradient on the steady velocity profile are studied numerically.

Original languageEnglish
Pages (from-to)1-31
Number of pages31
JournalAdvances in Applied Mathematics and Mechanics
Volume2
Issue number1
DOIs
StatePublished - 1 Jan 2010
Externally publishedYes

Keywords

  • Constitutive model
  • Elastomer melt
  • Non-affine polymer network
  • Poiseuille flow
  • Thermo-viscoelasticity

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