Viscoelastic properties of crosslinked LLDPE films biaxially oriented at temperatures below melting point

A. L. Bobovitch, Y. Unigovski, E. M. Gutman, E. Kolmakov, S. Vyazovkin

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Creep and stress-relaxation of linear low-density polyethylene (LLDPE) crosslinked with β-irradiation was studied as a function of irradiation dose. It was shown that both storage modulus and α-relaxation are influenced by irradiation. An influence of relatively low gel content on stress relaxation was detected. However, the creep results showed an increase of the creep strain when the polymer is irradiated with a dose below 4 Megarad (MR) in comparison with a nonirradiated film. This increase corresponded to the disorientation in the amorphous phase, which takes place as a result of the film heating during irradiation. This disorientation was demonstrated by differential scanning calorimetry (DSC) and X-ray analysis.

Original languageEnglish
Pages (from-to)3718-3723
Number of pages6
JournalJournal of Applied Polymer Science
Volume103
Issue number6
DOIs
StatePublished - 15 Mar 2007

Keywords

  • Creep
  • Crosslinking
  • Orientation
  • Polyethylene films
  • Stress relaxation
  • β-irradiation

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