Viscoelasticity of polyethylene/montmorillonite nanocomposite melts

A. D. Drozdov, E. A. Jensen, J. de C. Christiansen

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Observations are reported on low-density polyethylene melts reinforced with montmorillonite nanoclay at concentrations of filler ranging from 0 to 10 wt.% in small-amplitude shear oscillatory tests, start-up tests with a constant strain rate, and relaxation tests. Constitutive equations are derived for the time-dependent response of a nanocomposite melt at three-dimensional deformations with finite strains. The model accounts for (i) inhomogeneity in the distribution of nanoparticles, (ii) non-affinity of an equivalent polymer network with sliding junctions, and (iii) evolution of energies of inter-chain interaction driven by orientation of clay platelets. It is demonstrated that the stress-strain relations correctly describe the experimental data and adjustable parameters change consistently with nanoclay content.

Original languageEnglish
Pages (from-to)1027-1035
Number of pages9
JournalComputational Materials Science
Volume43
Issue number4
DOIs
StatePublished - 1 Oct 2008

Keywords

  • Constitutive equations
  • Nanocomposite melt
  • Non-affine network
  • Viscoelasticity

ASJC Scopus subject areas

  • General Computer Science
  • General Chemistry
  • General Materials Science
  • Mechanics of Materials
  • General Physics and Astronomy
  • Computational Mathematics

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