Circular Upcycling of Bottlebrush Thermosets
Dr. Daixuan Zhang
Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 USA
These authors contributed equally to this work.
Search for more papers by this authorDr. Foad Vashahi
Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 USA
These authors contributed equally to this work.
Search for more papers by this authorDr. Erfan Dashtimoghadam
Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 USA
Search for more papers by this authorDr. Xiaobo Hu
Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 USA
Search for more papers by this authorClaire J. Wang
Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 USA
Search for more papers by this authorJessica Garcia
Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 USA
Search for more papers by this authorAleksandra V. Bystrova
A.N.Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilova St. 28, Moscow, 119334 Russian Federation
Search for more papers by this authorDr. Mohammad Vatankhah-Varnoosfaderani
Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 USA
Search for more papers by this authorProf. Frank A. Leibfarth
Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 USA
Search for more papers by this authorCorresponding Author
Prof. Sergei S. Sheiko
Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 USA
Search for more papers by this authorDr. Daixuan Zhang
Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 USA
These authors contributed equally to this work.
Search for more papers by this authorDr. Foad Vashahi
Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 USA
These authors contributed equally to this work.
Search for more papers by this authorDr. Erfan Dashtimoghadam
Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 USA
Search for more papers by this authorDr. Xiaobo Hu
Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 USA
Search for more papers by this authorClaire J. Wang
Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 USA
Search for more papers by this authorJessica Garcia
Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 USA
Search for more papers by this authorAleksandra V. Bystrova
A.N.Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilova St. 28, Moscow, 119334 Russian Federation
Search for more papers by this authorDr. Mohammad Vatankhah-Varnoosfaderani
Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 USA
Search for more papers by this authorProf. Frank A. Leibfarth
Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 USA
Search for more papers by this authorCorresponding Author
Prof. Sergei S. Sheiko
Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 USA
Search for more papers by this authorGraphical Abstract
Built-in circularity can be achieved by integrating closed-loop recycling and upcycling in brush-like thermosets with dynamic crosslinks.
Abstract
The inability to re-process thermosets hinders their utility and sustainability. An ideal material should combine closed-loop recycling and upcycling capabilities. This trait is realized in polydimethylsiloxane bottlebrush networks using thermoreversible Diels–Alder cycloadditions to enable both reversible disassembly into a polymer melt and on-demand reconfiguration to an elastomer of either lower or higher stiffness. The crosslink density was tuned by loading the functionalized networks with a controlled fraction of dormant crosslinkers and crosslinker scavengers, such as furan-capped bis-maleimide and anthracene, respectively. The resulting modulus variations precisely followed the stoichiometry of activated furan and maleimide moieties, demonstrating the lack of side reactions during reprocessing. The presented circularity concept is independent from the backbone or side chain chemistry, making it potentially applicable to a wide range of brush-like polymers.
Conflict of interest
The authors declare no conflict of interest
Open Research
Data Availability Statement
The data that support the findings of this study are available from the corresponding author upon reasonable request.
Supporting Information
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