Cover Feature: Solvent‐Free Synthesis of Closed‐Loop Recyclable Acetal Thermosets Derived from Biobased Resources (ChemSusChem 13/2025)

The Cover Feature shows a sustainable, solvent-free strategy for closed-loop recyclable acetal thermosets. Bio-based vanillin derivatives and diols are combined under bulk conditions by using oxalic acid as a green catalyst, yielding thermosets with excellent mechanical properties. These materials can be efficiently closed-loop recycled in high yield and reformed into new thermosets, offering a circular solution for high-performance engineering applications. More information can be found in the Research Article by Ž. Tomović and co-workers (DOI: 10.1002/cssc.202500163).