Open-Air Chemical Recycling: Fully Oxygen-Tolerant ATRP Depolymerization
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2024-07-17
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Journal Article
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yes
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Abstract
While oxygen-tolerant strategies have been overwhelmingly developed for controlled radical polymerizations, the low radical concentrations typically required for high monomer recovery render oxygen-tolerant solution depolymerizations particularly challenging. Here, an open-air atom transfer radical polymerization (ATRP) depolymerization is presented, whereby a small amount of a volatile cosolvent is introduced as a means to thoroughly remove oxygen. Ultrafast depolymerization (i.e., 2 min) could efficiently proceed in an open vessel, allowing a very high monomer retrieval to be achieved (i.e., similar to 91% depolymerization efficiency), on par with that of the fully deoxygenated analogue. Oxygen probe studies combined with detailed depolymerization kinetics revealed the importance of the low-boiling point cosolvent in removing oxygen prior to the reaction, thus facilitating effective open-air depolymerization. The versatility of the methodology was demonstrated by performing reactions with a range of different ligands and at high polymer loadings (1 M monomer repeat unit concentration) without significantly compromising the yield. This approach provides a fully oxygen-tolerant, facile, and efficient route to chemically recycle ATRP-synthesized polymers, enabling exciting new applications.
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published
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Journal / series
Volume
146 (28)
Pages / Article No.
18848 - 18854
Publisher
American Chemical Society
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Organisational unit
09644 - Anastasaki, Athina / Anastasaki, Athina
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Funding
949219 - Reversing Controlled Radical Polymerisation: Towards Complete Depolymerisation (EC)