Wikipedia
Vitrimers are a class of plastics, which are derived from thermosets and are very similar to them. Vitrimers consist of molecular, covalent networks, which can change their topology by thermally activated bond-exchange reactions. At high temperatures they can flow like viscoelastic liquids, at low temperatures the bond-exchange reactions are immeasurably slow („frozen“) and the Vitrimers behave like classical thermosets at this point.
Vitrimers are strong glass formers.
Their behavior opens new possibilities in the application of thermosets like self-healing or simple processibility in a wide temperature range.
Polymer networks other than epoxy resins based on diglycidyl ether of bisphenol A have been utilized in vitrimer technology, such as polylactide, polyhydroxyurethanes, epoxidized soybean oil with citric acid, and polybutadiene.