Creep behavior of HDPE/PA66 microfibrillar composites modified with graphite nanoplatelets

Ivan Kelnar*, Ümitcan Bal, Alexandra Ujčič, Ludmila Kaprálková, Sabina Krejčíková, Michal Steinhart, Mohammadreza Nofar

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Low deformational resistance of polymers can be effectively improved by reinforcement, mostly using rigid particles and fibers. In contrast, this work reveals lower tensile creep resistance of microfibrillar composites (MFC) based on high-density polyethylene (HDPE) reinforced with in-situ formed polyamide 66 (PA66) fibrils against original undrawn system containing spherical inclusions. This performance is quite different from that of other known composites containing e.g. glass fibers or spheres. Moreover, the incorporation of graphite nanoplatelets (GNP) partly eliminates this shortcoming in MFC but worsens performance of undrawn system reinforced with PA66 inclusions. The obtained results highlight so far unknown negative effect of relatively low-modulus viscoelastic fibers and GNP-modified parameters of interface on creep resistance of polymer-polymer composites.

Original languageEnglish
Article number113
JournalJournal of Polymer Research
Issue number5
Publication statusPublished - 1 May 2020

Bibliographical note

Publisher Copyright:
© 2020, The Polymer Society, Taipei.


  • Blend
  • Creep resistance
  • Graphite nanoplatelets
  • Melt drawing
  • Microfibrillar composite


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