Nature CommunicationsAtom-economy upcycling of commodity thermoset polyurethane into photocuring 3D printing resins based on selective cleavage—crosslink strategyYan HuangXiaoxiao GuoYi DengSiyi YeYanling ZhuZenghe LiuJianwen ChenYutian Zhu2026-03-19Full textDOI https://doi.org/10.1038/s41467-026-70951-w