The effect of annealing on the elastoplastic response of isotactic polypropylene

Aleksey D. Drozdov, Jesper De C. Christiansen

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38 Scopus citations


Four series of tensile loading-unloading tests are performed on isotactic polypropylene in the sub-yield domain of deformations at room temperature. In the first series, injection-molded specimens are used as produced, whereas in the other series the samples are annealed for 24 h at 120, 140 and 160 °C, which covers the low-temperature region and an initial part of the high-temperature region of annealing temperatures. A constitutive model is developed for the elastoplastic behavior of a semicrystalline polymer. The stress-strain relations are determined by five adjustable parameters that are found by fitting the experimental data. The effect of annealing is analyzed on the material constants.

Original languageEnglish
Pages (from-to)21-31
Number of pages11
JournalEuropean Polymer Journal
Issue number1
StatePublished - 1 Jan 2003
Externally publishedYes


  • Annealing
  • Cyclic loading
  • Elastoplasticity
  • Isotactic polypropylene
  • Yielding

ASJC Scopus subject areas

  • Physics and Astronomy (all)
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry


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