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• W2109279189 abstract "Abstract In this work, bimetallic zero‐valent metal (Fe(0) powder and Cu(0) powder) was used to mediate the single electron transfer‐living radical polymerization (SET‐LRP) of methyl methacrylate at 25 °C in dimethyl sulfoxide. Different feed ratios of [Fe(0)] 0 /[Cu(0)] 0 (0/1.5, 0.5/1, 0.75/0.75, 1/0.5, and 1.3/0.2) were explored. With the increase of Fe(0) feed, the polymerization rate was mildly depressed with a prolonged induction period. While, the control over the molecular weights was improved upon the increase of Fe(0). A best control (initiation efficiency = 91%) was achieved at [Fe(0)] 0 /[Cu(0)] 0 = 1/0.5. A further increase of Fe(0) to the feed ratio of [Fe(0)] 0 :[Cu(0)] 0 = 1.3: 0.2 led to a uncontrolled polymerization. Explorations of available solvents and ligands for this polymerization confirmed the SET‐LRP mechanism. It was suggested that Fe(0) might act as a dual role in this process: one was the activation agent for Cu(0), which favored a better control over the molecular weights; The other was an alternative catalyst for the activation of R‐X or P n ‐X to generate radicals, which assured a comparable polymerization rate as that of Cu(0). This work provided an alternative and economical catalyst for SET‐LRP, and would eventually reinforce the SET‐LRP technique. © 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012" @default.
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• W2109279189 date "2011-11-28" @default.
• W2109279189 modified "2023-10-18" @default.
• W2109279189 title "Zero-valent bimetallic iron/copper catalyzed SET-LRP: A dual activation by zero-valent iron" @default.
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• W2109279189 doi "https://doi.org/10.1002/pola.25849" @default.
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