Self-recovery, fatigue and anti-fatigue of supramolecular elastomers

A. D. Drozdov, J. deClaville Christiansen

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Supramolecular elastomers (SMEs) with chains bridged by covalent and non-covalent bonds demonstrate self-healing and self-recovery at room temperature. A model is developed for the kinetics of self-recovery in SME subjected to cyclic deformation. Good agreement is shown between results of simulation and observations on SMEs with metal-ligand coordination bonds, hydrogen bonds, ionic hydrogen bonds, and temporary junctions formed via inter-polymer complexation. Analysis of multi-cycle tests on SMEs reveals their anti-fatigue property (the ability to eliminate cyclic softening by introducing short intervals of recovery between subsequent cycles of deformation). Two scenarios for anti-fatigue are discussed. For SMEs with the exponential kinetics of recovery, the optimal duration of rest between cycles is close to the time needed for total self-recovery. When the recovery process involves two stages, less than 1 min of rest between cycles suffices to eliminate cyclic softening.

Original languageEnglish
Article number105496
JournalInternational Journal of Fatigue
Volume134
DOIs
StatePublished - 1 May 2020
Externally publishedYes

Keywords

  • Anti-fatigue
  • Fatigue
  • Self-recovery
  • Supramolecular elastomer

ASJC Scopus subject areas

  • Modeling and Simulation
  • Materials Science (all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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