Tailor-made poly(vinylamine) via purple LED-activated RAFT polymerization of N-vinylformamide.

Photo-iniferter reversible addition-fragmentation chain transfer (PI-RAFT) of N-vinylformamide (NVF) was demonstrated by using purple light. PNVFs with predetermined molar masses and narrow molar mass distributions were obtained. High RAFT chain-end fidelity was confirmed by MALDI-TOF and ESI-MS, and chain extension experiment. To demonstrate the potential of this approach, an original PVP-b-PNVF diblock copolymer was synthesized and characterized by aqueous SEC, A4F, and 1 H DOSY-NMR. Finally, selective hydrolysis of PNVF block to corresponding pH-responsive PVP-b-PVAm was performed. This article is protected by copyright. All rights reserved.