Recyclable RAFT-3D printing.

ABSTRACT: Recyclable 3D printing systems are urgently needed to address sustainability challenges in polymer manufacturing. Herein, we report a closed-loop 3D printing strategy based on reversible addition-fragmentation chain transfer (RAFT) step-growth polymerization, in which dynamic trithiocarbonate linkages are embedded into the polymer network. The resulting network is recyclable via RAFT interchange under 405 nm irradiation in the presence of excess RAFT agents, regenerating oligomers bearing reactive chain-end groups. These intermediates can be directly re-crosslinked by adding stoichiometric vinyl monomers, thereby reconstructing the original polymer structure. Moreover, upcycled materials can be easily obtained by varying the vinyl monomer concentration. Digital light processing (DLP

SUBMITTER: Pan X 

PROVIDER: S-EPMC12481826 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature