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Department of Chemistry and Biochemistry & Wyant College of Optical Sciences, University of ArizonaIssue Date
2023-11-20
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Nature ResearchCitation
Bischoff, D.J., Lee, T., Kang, KS. et al. Unraveling the rheology of inverse vulcanized polymers. Nat Commun 14, 7553 (2023). https://doi.org/10.1038/s41467-023-43117-1Journal
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© The Author(s) 2023. This article is licensed under a Creative Commons Attribution 4.0 International License.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.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. © 2023, The Author(s).Note
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2041-1723Version
Final Published Versionae974a485f413a2113503eed53cd6c53
10.1038/s41467-023-43117-1
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Except where otherwise noted, this item's license is described as © The Author(s) 2023. This article is licensed under a Creative Commons Attribution 4.0 International License.