title: Highly active ppm level organic copper catalyzed photo-induced ICAR ATRP of methyl methacrylate.
abstract: A novel photo-induced homogeneous atom transfer radical polymerization (ATRP) system is constructed using an organic copper salt (Cu(SC(S)N(C2 H5 )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(C2 H5 )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).
authors.affiliation: Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China.
authors.forename: Xiaowu
authors.initials: X
authors.lastname: Jiang
authors.forename: Jian
authors.initials: J
authors.lastname: Wu
authors.forename: Lifen
authors.initials: L
authors.lastname: Zhang
authors.forename: Zhenping
authors.initials: Z
authors.lastname: Cheng
authors.forename: Xiulin
authors.initials: X
authors.lastname: Zhu
mesh_terms: D002384:Catalysis; D003300:Copper / Q000737:chemistry*; D007700:Kinetics; D009682:Magnetic Resonance Spectroscopy; D020366:Methylmethacrylate / Q000737:chemistry*; D008956:Models, Chemical; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry*; D010648:Phenylacetates / Q000737:chemistry*; D010720:Phosphines / Q000737:chemistry*; D011073:Polyamines / Q000737:chemistry*; D058105:Polymerization / Q000528:radiation effects; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry; D015203:Reproducibility of Results; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
chemical_list: C520678:(2,4,6-trimethylbenzoyl) diphenylphosphine oxide; C554858:N,N,N',N'',N''-pentamethyldiethylenetriamine; D009942:Organometallic Compounds; D010648:Phenylacetates; D010720:Phosphines; D011073:Polyamines; D011108:Polymers; D020366:Methylmethacrylate; D003300:Copper
keywords: N,N-diethyldithiocarbamate copper(II); atom transfer radical polymerization (ATRP); homogeneous catalysis; photopolymerization