Influence of extrusion parameters on filled polyphenylsulfone tufting yarns on open-hole tensile strength

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Tufting has been shown to improve the mechanical properties of composites. Unlike other published works which rely on commercially available materials, for this study, continuous polymer yarns with diameters ranging from 160 μm to 720 μm of unfilled PPSU and PPSU nanocomposites with 1 wt.% of carbon nanotubes (CNT) were prepared using a twin-screw extruder. The tensile properties of these yarns generally improved with the addition of CNT at higher values of ‘screw speed to haul-off’ ratio. This effect is correlated with the yarn draw down ratio and attributed to the nanofiller orientation induced in the thermoplastic matrix. The fibres exhibited as much as a 23% increase in Ultimate Tensile Strength (UTS) for the same parameter set when loaded with CNT. Depending on filler and processing parameters set, yarns varied in UTS from 96.4 MPa to 206.2 MPa for unfilled PPSU and PPSU-CNT, respectively.
Original languageEnglish
Pages (from-to)1167-1175
Number of pages9
JournalJournal of Reinforced Plastics and Composites
Issue number21-22
Early online date21 Dec 2022
Publication statusPublished (in print/issue) - 21 Dec 2022

Bibliographical note

Funding Information:
The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: The author would like to thank Daniel Breen, Sam Wilson, Oran Walsh and Seamus Mc Garrigle for their assistance with the project. This work was carried out under EPSRC grant number EP/L02697X/1 and was part funded by the Department for Employment and Learning (Northern Ireland Executive).

Publisher Copyright:
© The Author(s) 2022.


  • tufting
  • composites
  • through-thickness


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