Viscoelasticity, viscoplasticity, and creep failure of polypropylene/clay nanocomposites

A. D. Drozdov, A. L. Høg Lejre, J. de C. Christiansen

Research output: Contribution to journalArticlepeer-review

65 Scopus citations


Observations are reported on polypropylene/clay nanocomposites in tensile tests with various strain rates, relaxation tests at various strains, and creep tests with various stresses at room temperature. New constitutive equations are derived in viscoelasticity and viscoplasticity of nanocomposites. Adjustable parameters are found by fitting the experimental data. The stress-strain relations are applied to the analysis of creep rupture. It is demonstrated that reinforcement of polypropylene with 1 wt.% of nanoclay induces an increase in time to failure by an order of magnitude.

Original languageEnglish
Pages (from-to)2596-2603
Number of pages8
JournalComposites Science and Technology
Issue number15-16
StatePublished - 1 Dec 2009
Externally publishedYes


  • A. Nanocomposites
  • B. Creep
  • C. Modeling
  • D. Life prediction

ASJC Scopus subject areas

  • Ceramics and Composites
  • General Engineering


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