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Unraveling the rheology of inverse vulcanized polymers

Author

Listed:
  • Derek J. Bischoff

    (University of Delaware)

  • Taeheon Lee

    (University of Arizona)

  • Kyung-Seok Kang

    (University of Arizona)

  • Jake Molineux

    (University of Arizona)

  • Wallace O’Neil Parker

    (Eni S.p.A.)

  • Jeffrey Pyun

    (University of Arizona)

  • Michael E. Mackay

    (University of Delaware
    University of Delaware)

Abstract

Multiple relaxation times are used to capture the numerous stress relaxation modes found in bulk polymer melts. Herein, inverse vulcanization is used to synthesize high sulfur content (≥50 wt%) polymers that only need a single relaxation time to describe their stress relaxation. The S-S bonds in these organopolysulfides undergo dissociative bond exchange when exposed to elevated temperatures, making the bond exchange dominate the stress relaxation. Through the introduction of a dimeric norbornadiene crosslinker that improves thermomechanical properties, we show that it is possible for the Maxwell model of viscoelasticity to describe both dissociative covalent adaptable networks and living polymers, which is one of the few experimental realizations of a Maxwellian material. Rheological master curves utilizing time-temperature superposition were constructed using relaxation times as nonarbitrary horizontal shift factors. Despite advances in inverse vulcanization, this is the first complete characterization of the rheological properties of this class of unique polymeric material.

Suggested Citation

  • Derek J. Bischoff & Taeheon Lee & Kyung-Seok Kang & Jake Molineux & Wallace O’Neil Parker & Jeffrey Pyun & Michael E. Mackay, 2023. "Unraveling the rheology of inverse vulcanized polymers," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-43117-1
    DOI: 10.1038/s41467-023-43117-1
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    References listed on IDEAS

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    1. Wim Denissen & Martijn Droesbeke & Renaud Nicolaÿ & Ludwik Leibler & Johan M. Winne & Filip E. Du Prez, 2017. "Chemical control of the viscoelastic properties of vinylogous urethane vitrimers," Nature Communications, Nature, vol. 8(1), pages 1-7, April.
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    Cited by:

    1. Botuo Zheng & Liling Zhong & Xiaoxiao Wang & Peiyao Lin & Zezhou Yang & Tianwen Bai & Hang Shen & Huagui Zhang, 2024. "Structural evolution during inverse vulcanization," Nature Communications, Nature, vol. 15(1), pages 1-17, December.

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