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Preparation of Well‐Defined Poly[(ethylene oxide)‐ block ‐(sodium 2‐acrylamido‐2‐methyl‐1‐propane sulfonate)] Diblock Copolymers by Water‐Based Atom Transfer Radical Polymerization
Author(s) -
Paneva Dilyana,
Mespouille Laetitia,
Manolova Nevena,
Degée Philippe,
Rashkov Iliya,
Dubois Philippe
Publication year - 2006
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200600389
Subject(s) - copolymer , ethylene oxide , polymer chemistry , dispersity , molar mass , sulfonate , polymerization , monomer , atom transfer radical polymerization , propane , solvent , materials science , chemistry , sodium , polymer , organic chemistry
Summary: Well‐defined poly[(ethylene oxide)‐ block ‐(sodium 2‐acrylamido‐2‐methyl‐1‐propane sulfonate)] diblock copolymers [P(EO m ‐ b ‐AMPS n )], have been obtained by water‐based ATRP using α ‐methoxy‐ ω ‐(2‐methylbromoisobutyrate) poly(ethylene oxide)s (MeO‐P[EO] m ‐Br i B with m ranging from 12 to 113) and CuBr · 2Bpy (Bpy for 2,2′‐bipyridyl) as macroinitiator and catalytic complex, respectively. Compared to direct polymerization in water, it has been demonstrated that the water/methanol (3:1, v/v) mixture is better suited for predicting the final number‐average molar mass from the initial monomer‐to‐macroinitiator molar ratio and achieving a quite narrow polydispersity, even at high monomer conversion ( $\overline M _{\rm w} /\overline M _{\rm n}$ ≈ 1.4 at 80% conversion). The effect of temperature, solvent mixture composition and addition of NaCl salt on the polymerization rate and extent of control over the copolymer molecular parameters have been highlighted as well.