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Toughening Healable Supramolecular Double Polymer Networks Based on Hydrogen Bonding and Metal Coordination

DOKPE

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  • 2024
Submitted to:
  • Chemistry – A European Journal. - Chichester, UK : Wiley. - 2024
Double polymer networks
supramolecular motifs
healable materials
improved elasticity
orthogonal stimuli-responsiveness
English Double polymer networks (DNs) consist of two interpenetrating polymer networks and can offer properties that are not merely a sum of the parts. Here, we report an elastic DN made from two supramolecular polymers (SMPs) that consist of the same poly(n-butyl acrylate) (BA) backbone. The two polymers feature different non-covalent binding motifs, which form dynamic, reversible cross-links. The polymers were prepared by reversible addition−fragmentation chain-transfer polymerization of n-butyl acrylate and either the self-complementary hydrogen-bonding motif 2-ureido-4[1H]pyri¬mi¬dinone, or the 2,6-bis(1′-methylbenzimidazolyl)pyridine ligand, which forms complexes with metal ions. The supramolecular DN made by these components combines features of the single networks, including high thermal stability and resistance to creep. The DN further exhibits excellent healability and displays a higher extensibility and a higher toughness than its constituents. The mechanical characteristics of the DN can be further enhanced by selectively pre-stretching one of the networks, which is readily possible due to the reversible formation of the supramolecular cross-links and their orthogonal stimuli-responsiveness.
Faculty
Faculté des sciences et de médecine
Department
AMI - Chimie des polymères et matériaux
Language
  • English
Classification
Chemistry
License
License undefined
Open access status
green
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/329753
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