Toward Circular Recycling of Polyurethanes: Depolymerization and Recovery of Isocyanates Article Swipe
Robert M. O’Dea
,
Mridula Nandi
,
Genevieve Kroll
,
Jackie R. Arnold
,
LaShanda T. J. Korley
,
Thomas H. Epps
·
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.1021/jacsau.4c00013
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.1021/jacsau.4c00013
We report a depolymerization strategy to nearly quantitatively regenerate isocyanates from thermoplastic and thermoset polyurethanes (PUs) and then resynthesize PUs using the recovered isocyanates. To date, chemical/advanced recycling of PUs has focused primarily on the recovery of polyols and diamines under comparatively harsh conditions (e.g., high pressure and temperature), and the recovery of isocyanates has been difficult. Our approach leverages an organoboron Lewis acid to depolymerize PUs directly to isocyanates under mild conditions (e.g., ∼80 °C in toluene) without the need for phosgene or other harsh reagents, and we show that both laboratory-synthesized and commercially sourced PUs can be depolymerized. Furthermore, we demonstrate the utility of the recovered isocyanate in the production of second-generation PUs with thermal properties and molecular weights similar to those of the virgin PUs. Overall, this route uniquely provides an opportunity for circularity in PU materials and can add significant value to end-of-life PU products.
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Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1021/jacsau.4c00013
- https://pubs.acs.org/doi/pdf/10.1021/jacsau.4c00013
- OA Status
- gold
- Cited By
- 26
- References
- 54
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4394711278
All OpenAlex metadata
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https://openalex.org/W4394711278Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1021/jacsau.4c00013Digital Object Identifier
- Title
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Toward Circular Recycling of Polyurethanes: Depolymerization and Recovery of IsocyanatesWork title
- Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2024Year of publication
- Publication date
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2024-04-11Full publication date if available
- Authors
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Robert M. O’Dea, Mridula Nandi, Genevieve Kroll, Jackie R. Arnold, LaShanda T. J. Korley, Thomas H. EppsList of authors in order
- Landing page
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https://doi.org/10.1021/jacsau.4c00013Publisher landing page
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https://pubs.acs.org/doi/pdf/10.1021/jacsau.4c00013Direct link to full text PDF
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YesWhether a free full text is available
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goldOpen access status per OpenAlex
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https://pubs.acs.org/doi/pdf/10.1021/jacsau.4c00013Direct OA link when available
- Concepts
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Depolymerization, Isocyanate, Thermosetting polymer, Polyurethane, Materials science, Chemistry, Organic chemistryTop concepts (fields/topics) attached by OpenAlex
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26Total citation count in OpenAlex
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2025: 19, 2024: 7Per-year citation counts (last 5 years)
- References (count)
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54Number of works referenced by this work
- Related works (count)
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10Other works algorithmically related by OpenAlex
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