Thermoresponsive Dynamic Covalent Single‐Chain Polymer Nanoparticles Reversibly Transform into a Hydrogel

To gel and back: Polymer nanoparticles can be reversibly transformed into a chemically cross-linked hydrogel. This transformation is triggered by the application of heat, which causes the polymer chains to aggregate, and the dynamic nature of the covalent cross-linking serves to reorganize the polymer chains into a hydrogel network.