The Front Cover depicts chemoenzymatic cascade depolymerization of a polyether-polyester-polyurethane (PUR). PUR pellets were first pre-treated by heat, followed by a two-enzyme hydrolysis process in which cutinase HiC releases intermediate products that are converted into their constituent monomers by the urethanase SP2. The proof-of-concept found in the Research Article by P.-O. Syrén and co-workers (DOI: 10.1002/cssc.202502633). demonstrates the strong potential and robustness of cascade depolymerization as an environmentally friendly and sustainable strategy for PUR recycling. The cover was hand-drawn by Xueyingzi Chen and digitally coloured.
Sun et al. (Fri,) studied this question.