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Highly Active ppm Level Organic Copper Catalyzed Photo‐Induced ICAR ATRP of Methyl Methacrylate
Author(s) -
Jiang Xiaowu,
Wu Jian,
Zhang Lifen,
Cheng Zhenping,
Zhu Xiulin
Publication year - 2014
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.201400393
Subject(s) - monomer , methyl methacrylate , atom transfer radical polymerization , polymerization , polymer chemistry , chemistry , catalysis , copper , polymer , organic chemistry
A novel photo‐induced homogeneous atom transfer radical polymerization (ATRP) system is constructed using an organic copper salt (Cu(SC(S)N(C 2 H 5 ) 2 ) 2 ) as a photo‐induced catalyst at 30 °C. Herein, N,N,N′,N′′,N′′ ‐pentamethyldiethylenetriamine (PMDETA) is used as a ligand, ethyl 2‐bromophenylacetate (EBPA) as an ATRP initiator, and (2,4,6‐trimethylbenzoyl) diphenylphosphine oxide (TPO) as a photo‐induced radical initiator to establish an ICAR (initiators for continuous activator regeneration) ATRP using methyl methacrylate (MMA) as a modal monomer. The effect of the concentration of the organic copper on the polymerization is investigated in detail. It is found that well‐controlled polymerization can be obtained even with the amount of (Cu(SC(S)N(C 2 H 5 ) 2 ) 2 decreasing to a 1.56 ppm level, with the molecular weight of the resultant polymers increasing linearly with monomer conversion while maintaining a narrow molecular weight distribution (M ¯ w /M ¯ n< 1.3).