Interfacial interactions in bicomponent polymer fibers

A. Andrés Leal*, Olivia A. Neururer, Alex Bian, Ali Gooneie, Patrick Rupper, Kunal Masania, Clemens Dransfeld, Rudolf Hufenus

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)


The core – sheath interfacial interactions in a bicomponent thermoplastic filament have been analyzed by means of an adapted micro-mechanical approach for interfacial pull-out. The method relies on a specimen preparation procedure that selectively removes a segment of the sheath component while leaving the core intact. This adaptation of the classical pull-out method enables the controlled extraction of the exposed core from the embedded bicomponent segment. Using linear low density polyethylene (LLDPE) – polyamide 6 (PA6) filaments with a diameter of approximately 100 μm, it has been shown that the addition of 2–5 weight % maleic anhydride grafted polyethylene (MAPE) significantly increases the surface energy of LLDPE, which results in substantial improvements in the mean interfacial shear strength and work to debond. Use of 10 % wt. MAPE leads to the formation of voids which are detrimental to the mechanical properties of the core – sheath interface, despite a further enhancement of surface energy.

Original languageEnglish
Pages (from-to)375-386
Number of pages12
Publication statusPublished - 25 Apr 2018
Externally publishedYes


  • Fiber
  • Interface
  • Thermoplastic


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