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- W2108644952 abstract "Abstract Fluorine‐containing amphiphilic ABA triblock copolymers, poly(2‐hydroxyethyl vinyl ether)‐ block ‐poly[2‐(2,2,3,3,3‐pentafluoropropoxy)ethyl vinyl ether]‐ block ‐poly(2‐hydroxyethyl vinyl ether) [poly(HOVE‐ b ‐PFPOVE‐ b ‐HOVE)] (HFH), poly[2‐(2,2,3,3,3‐pentafluoropropoxy)ethyl vinyl ether]‐ block ‐poly(2‐hydroxyethyl vinyl ether)‐ block ‐poly[2‐(2,2,3,3,3‐pentafluoropropoxy)ethyl vinyl ether] [poly(PFPOVE‐ b ‐HOVE‐ b ‐PFPOVE)] (FHF), and poly( n ‐butyl vinyl ether)‐ block ‐poly(2‐hydroxyethyl vinyl ether)‐ block ‐poly( n ‐butyl vinyl ether) [poly(NBVE‐ b ‐HOVE‐ b ‐NBVE)] (LHL), were synthesized, and their behavior in water was investigated. The aforementioned polymers were prepared by sequential living cationic polymerization of 2‐acetoxyethyl vinyl ether (AcOVE) and PFPOVE or NBVE, followed by hydrolysis of acetyl groups in polyAcOVE. FHF and LHL formed a hydrogel in water, whereas HFH gave a homogeneous aqueous solution. In addition, the gel‐forming concentration of FHF was much lower than that of corresponding LHL. Surface‐tension measurements of the aqueous polymer solutions revealed that all the triblock copolymers synthesized formed micelles or aggregates above about 1.0 × 10 −4 mol/L. The surface tensions of HFH and FHF solutions above the critical micelle concentration were lower than those of LHL, indicating high surface activity of fluorine‐containing triblock copolymers. Small‐angle X‐ray scattering measurements revealed that HFH formed a core‐shell sperical micelle in 1 wt % aqueous solutions, whereas the other block copolymers caused more conplicated assembly in the solutions. © 2001 John Wiley & Sons, Inc. J Polym Sci Part A: Polym Chem 39: 3751–3760, 2001" @default.
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- W2108644952 date "2001-09-24" @default.
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- W2108644952 title "Synthesis and hydrogel formation of fluorine-containing amphiphilic ABA triblock copolymers" @default.
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- W2108644952 doi "https://doi.org/10.1002/pola.10011" @default.
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