The Influence of Processing Temperature on the Tensile Properties of Melt-Spun PLA Fibres and their Self-Reinforced Composites

Stergios Goutianos*, Justine Beauson

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

The temperature during the consolidation of self-reinforced PLA composites has a significant effect on their mechanical properties. In the present work, the effect of the consolidation or processing temperature on the properties of melt-spun, highly oriented PLA fibres is experimentally studied through single fibre tests. It is shown that the Young's modulus and strain to failure of PLA fibres increases with exposure to consolidation / processing temperature, and the strength decreases more drastically. Using these data and findings from earlier studies, it is demonstrated that the dependence of the tensile properties of self-reinforced PLA composites on the processing temperature can be directly predicted from the single PLA fiber properties as a function of the processing temperature. This prediction holds true provided that the tensile properties of both the PLA fibers and self-reinforced PLA composites are measured using the same cross-head speed or strain rate.
Original languageEnglish
JournalApplied Composite Materials
Volume30
Pages (from-to)1865-1882
Number of pages18
ISSN0929-189X
DOIs
Publication statusPublished - 2023

Keywords

  • Weibull distribution
  • Fibre strength
  • Poly(lactic acid
  • PLA fibres
  • Self-reinforced composites

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