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Highly Efficient and Facile Photocatalytic Recycling System Suitable for ICAR ATRP of Hydrophilic Monomers
Author(s) -
Jiang Xiaowu,
Zhang Lifen,
Cheng Zhenping,
Zhu Xiulin
Publication year - 2016
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.201600215
Subject(s) - monomer , polymerization , photocatalysis , photoinitiator , materials science , atom transfer radical polymerization , catalysis , polymer , photochemistry , polymer chemistry , heptane , chemistry , organic chemistry , composite material
Photoinduced initiators for continuous activator regeneration atom transfer radical polymerization (ATRP) of hydrophilic monomers in heptane/ethanol latent‐biphasic system for copper catalyst separation and recycling have been realized for the first time at room temperature with different wavelengths of visible light LED (green, blue, purple, and white LED) as external stimulus, using 2‐bromophenylacetate as the ATRP initiator and camphorquinone/triethylamine as the photoinitiator. In this system, hybrid catalyst complex (HCc) is synthesized as a novel nonpolar catalyst, which is preferentially dissolved in heptane. The hydrophilic polymers obtained catalyzed by HCc in heptane/ethanol mixture solvent show typical “living” features, for example, the values of M n,GPC increase linearly with monomer conversion up to quantitative level (>96%) and the molecular weight distributions were kept narrow ( M w / M n < 1.20) throughout the polymerization process. It should be noted that the excellent controllability of this novel polymerization system can be achieved even after 5 catalyst recycling experiments under LED irradiation.