The author of 《Rapid SARA ATRP of Methyl Acrylate in Polyethylene Glycol Mediated by a Mixed Sulfite/CuBr2 Catalytic System》 were Xian Rong Shen; Xiang, Yi Xin; Gao, Jian Gang. And the article was published in Polymer Science, Series B: Polymer Chemistry in 2019. Quality Control of Cupric bromide The author mentioned the following in the article:
Supplemental activator and reducing agent atom transfer radical polymerization (SARA ATRP) of Me acrylate was successfully performed in inexpensive, eco-friendly polyethylene glycol solvents and catalyzed by a mixed sulfite/CuBr2 system at room temperature The presence of polyethylene glycol in the reaction mixtures allowed fast and controlled polymerizations throughout the whole reaction time. Remarkably, a fast polymerization can be achieved with a monomer conversion reaching 90% in only 50 min using PEG 200 as the reaction solvent. The controlled character of the ATRP of Me acrylate was confirmed by the linear increase in mol. weight with monomer conversion, the narrow mol. weight distributions (Mw/Mn = 1.15) and the results of chain extension experiments 1H NMR anal. also confirmed the mol. structure and chain-end functionality of the obtained polymers, and the effects of PEG mol. weight and inorganic sulfites on the polymerization behavior were investigated. The results came from multiple reactions, including the reaction of Cupric bromide(cas: 7789-45-9Quality Control of Cupric bromide)
Cupric bromide(cas: 7789-45-9) can be used as reducing agent, when complexed by three molecules of pyridine initiators for the controlled polymerization of styrene, methyl acrylate and methyl methacrylate.Quality Control of Cupric bromide
Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”