A Highly Dynamic Covalent Polymer Network without Creep: Mission Impossible?

Dynamic covalent polymer networks provide an interesting solution to the challenging recyclability of thermosets and elastomers. One of the remaining design constraints, however, is balancing thermal reprocessability in the form of material flow with dimensional stability during use. As a result, ma...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2022-11, Vol.61 (48), p.e202210405-n/a
Main Authors: Van Lijsebetten, Filip, Debsharma, Tapas, Winne, Johan M., Du Prez, Filip E.
Format: Article
Language:English
Subjects:
Addition polymerization
Chemical reactions
Creep Resistance
Creep strength
Dimensional stability
Dynamic Covalent Networks
Elastomers
Fast Reprocessing
Flow stability
Heat resistance
High temperature
Polymers
Reactivity
Recyclability
Recyclable Thermoset
Rheological properties
Robust control
Sustainable development
Sustainable materials
Vitrimers
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Summary:Dynamic covalent polymer networks provide an interesting solution to the challenging recyclability of thermosets and elastomers. One of the remaining design constraints, however, is balancing thermal reprocessability in the form of material flow with dimensional stability during use. As a result, many chemistries are being investigated in order to improve bond reactivity control and material robustness. This Minireview highlights a number of promising concepts, with a particular emphasis on disconnecting chemical reactivity in low and high temperature regimes to obtain creep resistant, yet highly dynamic polymer networks. In addition, we will highlight the impact of sharp reactivity changes when applying extrapolation‐based approaches during rheological analysis. As a result, we are confident that abandoning the myth of “permanent” reactivity will aid in the development of sustainable polymeric materials that can truly combine the benefits of thermoplastic and thermoset behaviour. One of the largest challenges in the design of dynamic covalent networks is to balance reactivity during reprocessing with stability during use. In this Minireview several strategies are highlighted that combine high processability and creep resistance such as latent catalysis, availability of reactive groups, substituents and intrinsic stability of the dynamic bond.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.202210405