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Photoinduced Iron‐Based Water‐Induced Phase Separable Catalysis (WPSC) ICAR ATRP of Poly(ethylene glycol) Methyl Ether Methacrylate
Author(s) -
Wu Jian,
Zhang Bingjie,
Zhang Lifen,
Cheng Zhenping,
Zhu Xiulin
Publication year - 2017
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201700116
Subject(s) - polymerization , polymer chemistry , photoinitiator , ethylene oxide , methyl methacrylate , ethylene glycol , catalysis , chemistry , atom transfer radical polymerization , monomer , materials science , polymer , organic chemistry , copolymer
Iron‐mediated atom transfer radical polymerization (ATRP) has gained extensive attention because of the superiority of iron catalysts, such as low toxicity, abundant reserves, and good biocompatibility. Herein, a practical iron catalyst recycling system, photoinduced iron‐based water‐induced phase separable catalysis ATRP with initiators for continuous activator regeneration, at room temperature is developed for the first time. In this polymerization system, the polymerization is conducted in homogenous solvents consisting of p ‐xylene and ethanol, using commercially available 5,10,15,20‐tetraphenyl‐21H,23H‐porphine iron(III) chloride as the iron catalyst, ethyl 2‐bromophenylacetate as the ATRP initiator, 2,4,6‐trimethylbenzoyl diphenylphosphine oxide as the photoinitiator, and poly(ethylene glycol) methyl ether methacrylate as the model hydrophilic monomer. After polymerization, a certain amount of water is added to induce the phase separation so that the catalyst can be separated and recycled in p ‐xylene phase with very low residual metal complexes (<12 ppm) in the resultant polymers even after six times recycle experiments.