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Denissen W, Droesbeke M, Nicolaÿ R, et al. Chemical control of the viscoelastic properties of vinylogous urethane vitrimers. Nat Commun. 2017;8:14857doi: 10.1038/ncomms14857.
Denissen, W., Droesbeke, M., Nicolaÿ, R., Leibler, L., Winne, J. M., & Du Prez, F. E. (2017). Chemical control of the viscoelastic properties of vinylogous urethane vitrimers. Nature communications, 814857. https://doi.org/10.1038/ncomms14857
Denissen, Wim, et al. "Chemical control of the viscoelastic properties of vinylogous urethane vitrimers." Nature communications vol. 8 (2017): 14857. doi: https://doi.org/10.1038/ncomms14857
Denissen W, Droesbeke M, Nicolaÿ R, Leibler L, Winne JM, Du Prez FE. Chemical control of the viscoelastic properties of vinylogous urethane vitrimers. Nat Commun. 2017 Mar 20;8:14857. doi: 10.1038/ncomms14857. PMID: 28317893; PMCID: PMC5364391.
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Nat Commun. 2017 Mar 20;8:14857. doi: 10.1038/ncomms14857.

Chemical control of the viscoelastic properties of vinylogous urethane vitrimers.

Nature communications

Wim Denissen, Martijn Droesbeke, Renaud Nicolaÿ, Ludwik Leibler, Johan M Winne, Filip E Du Prez

Affiliations

  1. Department of Organic and Macromolecular Chemistry, Polymer Chemistry Research Group and Laboratory for Organic Synthesis, Ghent University, Krijgslaan 281 S4-bis, Ghent B-9000, Belgium.
  2. Matière Molle et Chimie, UMR 7167 CNRS-ESPCI, ESPCI ParisTech, 10 rue Vauquelin, Paris 75005, France.

PMID: 28317893 PMCID: PMC5364391 DOI: 10.1038/ncomms14857

Abstract

Vinylogous urethane based vitrimers are polymer networks that have the intrinsic property to undergo network rearrangements, stress relaxation and viscoelastic flow, mediated by rapid addition/elimination reactions of free chain end amines. Here we show that the covalent exchange kinetics significantly can be influenced by combination with various simple additives. As anticipated, the exchange reactions on network level can be further accelerated using either Brønsted or Lewis acid additives. Remarkably, however, a strong inhibitory effect is observed when a base is added to the polymer matrix. These effects have been mechanistically rationalized, guided by low-molecular weight kinetic model experiments. Thus, vitrimer elastomer materials can be rationally designed to display a wide range of viscoelastic properties.

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