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- W2239685593 abstract "A comprehensive set of amphiphilic star-shaped block copolyethers with a fixed molecular weight and composition was synthesized via the t-Bu-P4-catalyzed ring-opening polymerization (ROP) of 2-(2-(2-methoxyethoxy)ethoxy)ethyl glycidyl ether as a hydrophilic monomer and decyl glycidyl ether as a hydrophobic monomer. The three- and four-armed star-block copolyethers, i.e., the (AB)3-, (BA)3-, (AB)4-, and (BA)4-type star-block copolyethers, where A and B represent hydrophilic and hydrophobic blocks, respectively, were synthesized by the sequential t-Bu-P4-catalyzed block copolymerization using tri- and tetra-alcohol initiators, respectively, according to the core-first method. The homogeneous growth of each arm was confirmed by cleaving the linkages between the initiator residue and polyether arms. The synthesis of the A2B2-, AB2-, and A2B-type miktoarm star copolyethers was achieved by the combination of the t-Bu-P4-catalyzed ROP and azido-alkyne click chemistry. The azido- and ethynyl-functionalized precursor polyethers with the predicted molecular weights were separately prepared by the t-Bu-P4-catalyzed ROP with the aid of functional initiators as well as a terminator. The intermolecular click reaction of the precursors provided the desired miktoarm star copolyethers. All the obtained star-shaped block copolyethers had a comparable monomer composition (degree of polymerization = 50:50) and total molecular weight (ca. 22 200 g mol–1) with a narrow dispersity (<1.05). The hydrodynamic diameter and the cloud point analyses for the aqueous micellar solution of the amphiphilic star-shaped block copolyethers revealed that the self-assembly properties were affected by the block arrangements and branched architectures of the amphiphilic polymers." @default.
- W2239685593 created "2016-06-24" @default.
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- W2239685593 date "2016-01-11" @default.
- W2239685593 modified "2023-09-24" @default.
- W2239685593 title "Synthesis of Well-Defined Amphiphilic Star-Block and Miktoarm Star Copolyethers via <i>t</i>-Bu-P<sub>4</sub>-Catalyzed Ring-Opening Polymerization of Glycidyl Ethers" @default.
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- W2239685593 doi "https://doi.org/10.1021/acs.macromol.5b02459" @default.
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