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From Polymers to Rings and Back Again: Chemical Recycling of Polyesters to Macrolactones

Abstract:
Cyclic anhydride and epoxide ring‐opening copolymerization is a versatile and controlled route to make polyesters, gaining attention in different application sectors. But so far, the chemical recycling of these polyesters to cyclic monomers is under‐explored. Here, the catalytic chemical recycling of aliphatic polyesters to selectively form 16‐ and 18‐membered lactones is presented. The recycling reactions are catalyzed using commercial tin(II) octoate and conducted in the polymer melt (230 °C) resulting in high conversions to the macrolactones (>90%). The recycled macrolactones undergo catalyzed ring‐opening polymerizations to produce polyesters with equivalent properties to the virgin materials.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1002/anie.202423478

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Institution:
University of Oxford
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Institution:
University of Oxford
Role:
Author
More by this author
Institution:
University of Oxford
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Author
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Institution:
University of Oxford
Role:
Author



Publisher:
Wiley
Journal:
Angewandte Chemie International Edition More from this journal
Article number:
e202423478
Publication date:
2025-03-27
Acceptance date:
2025-03-09
DOI:
EISSN:
1521-3773
ISSN:
1433-7851


Language:
English
Keywords:
Source identifiers:
2806065
Deposit date:
2025-03-27
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