Viscoelasticity and viscoplasticity of polypropylene/polyethylene blends

A. D. Drozdov, J. D.E.C. Christiansen, R. Klitkou, C. G. Potarniche

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Observations are reported on polypropylene/polyethylene blends with various concentrations of components in uniaxial tensile tests with constant strain rates, relaxation tests, and creep tests at room temperature. A model is developed for the viscoelastic and viscoplastic responses of polymer blends at arbitrary three-dimensional deformation with small strains. Material constants in the constitutive equations are determined by fitting the experimental data. It is found that all adjustable parameters evolve with blend composition following an analog of the rule of mixture. Lifetime of blends under condition of creep rupture is evaluated by numerical simulation.

Original languageEnglish
Pages (from-to)2498-2507
Number of pages10
JournalInternational Journal of Solids and Structures
Volume47
Issue number18-19
DOIs
StatePublished - 1 Sep 2010
Externally publishedYes

Keywords

  • Constitutive modeling
  • Low density polyethylene
  • Metallocene catalysed polypropylene
  • Viscoelasticity
  • Viscoplasticity

ASJC Scopus subject areas

  • Modeling and Simulation
  • Materials Science (all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Applied Mathematics

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