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Epoxy vitrimers are crosslinked epoxy networks whose junctions are dynamic covalent bonds that exchange without dissolving the network [1]. The resin is cured with a hardener carrying the exchangeable linkage, typically an ester, a disulfide or a boronate ester, so the topology rearranges while the crosslink density is preserved [1]. Above the topology freezing transition the exchange rate exceeds the relaxation of the network, and the solid flows as a glass-forming liquid while remaining insoluble [1]. Below that temperature the same network behaves as a conventional thermoset [2]. Because the exchange is associative, the number of bonds stays constant throughout the rearrangement [3].
- vitrimer network
- dynamic covalent bond
- transesterification
- topology freezing transition
- associative exchange
References
- Shi, Q.; Yu, K.; Kuang, X.; Mu, X.; Dunn, C.K.; Dunn, M.L.; Wang, T.; Jerry Qi, H.; Recyclable 3D printing of vitrimer epoxy. Materials Horizons 2017, 4, 598-607, 10.1039/c7mh00043j.
- Kumar, S.; Krishnan, S.; Prabakaran, K.; Renewable Resource-Based Epoxy Vitrimer Composites for Future Application: A Comprehensive Review. ACS Sustainable Resource Management 2024, 1, 2086-2107, 10.1021/acssusresmgt.4c00200.
- Yao, H.; Xu, X.; Chen, Z.; Li, K.; Wang, T.; Pei, S.; Fu, J.; Wang, J.; A review of epoxy vitrimer-based thermally conductive composites. RSC Advances 2025, 15, 37908-37925, 10.1039/d5ra05874k.
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