Synthesis of ultrahigh molar mass poly(2-hydroxyethyl methacrylate) by single-electron transfer living radical polymerization
Polymer Chemistry, ISSN: 1759-9962, Vol: 4, Issue: 9, Page: 2760-2766
2013
- 75Citations
- 61Captures
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Article Description
Cu(0)/Me-TREN mediated SET-LRP of 2-hydroxyethyl methacrylate (HEMA) initiated with methyl α-bromophenylacetate (MBrPA) was performed in DMSO at 25 °C targeting [M]/[I] = 100 to 10000. At [M]/[I] = 100, SET-LRP of HEMA is a living process, and provided PHEMA with M = 21500 g mol and M /M = 1.20 in 7 h. Using similar conditions, PHEMA with M = 35000 to 152200 g mol and M/M = 1.28 to 1.39 was prepared within 9 h. When targeting higher [M]/[I] (2000 to 10000), Me-TREN concentration was changed to 0.15 equivalent with respect to initiator concentration, for at higher ligand concentration the polymerization did not proceed beyond 30% conversion even after a long reaction time. PHEMA with M = 333500 to 1017900 g mol and M/M lower than 1.50 was synthesized for the first time by direct polymerization of HEMA without protecting the hydroxyl group. © 2013 The Royal Society of Chemistry.
Bibliographic Details
Royal Society of Chemistry (RSC)
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