Yield strain behavior of poly(ethylene terephthalate): Correlation with yield stress behavior in strain rate, temperature, and structure dependence

Jung Yul Lim, Sang Yong Kim

Research output: Contribution to journalArticle

6 Scopus citations


The yield strain variation in poly(ethylene terephthalate) (PET) as a function of strain rate, temperature and PET structure to reveal the similarity and difference with the yield stress behavior was analyzed. Oriented semicrytalline PET samples displayed a linear increase in yield strain e y with logarithmic strain rate, similar to normalized yield stress σy. The strain rate dependence of ey was smaller at higher temperature and for PET of increased crystallinity and orientation. A dimensional analysis revealed that PET had a distinct transition in both e y and its strain rate dependence at the activation volume of ca. 1.1 nm3.

Original languageEnglish (US)
Pages (from-to)769-773
Number of pages5
JournalPolymer Journal
Issue number9
StatePublished - Nov 15 2004



  • Activation Volume
  • PET
  • Structure-Property Relations
  • Yield Strain
  • Yield Stress

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry

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