Journal
MACROMOLECULES
Volume 37, Issue 9, Pages 3128-3135Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ma036010c
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We report a new method to synthesize ABC 3-miktoarm star terpolymers by combining three different controlled/living polymerization techniques: ring-opening polymerization (ROP), atom transfer radical polymerization (ATRP), and nitroxide-mediated radical polymerization (NMRP). A trifunctional initiator bearing a hydroxy group, an ATRP initiator, and a NMRP initiator was designed and synthesized. The structure was confirmed by H-1 NMR, C-13 NMR, and mass spectroscopy. ABC star terpolymers were then prepared from the trifunctional initiator by sequential ROP of epsilon-caprolactone, ATRP of methyl methacrylate, and NMRP of styrene. GPC and kinetic analysis indicated that the polymerizations were controlled. The 3-miktoarm star structure was further confirmed by cleavage of a star terpolymer.
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