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ABC triblock polyampholytes containing a neutral hydrophobic block, a polyacid and a polybase
Author(s) -
Giebeler Ellen,
Stadler Reimund
Publication year - 1997
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1997.021981204
Subject(s) - copolymer , polymer chemistry , methacrylate , polystyrene , poly(methacrylic acid) , methacrylic acid , chemistry , tetrahydrofuran , potentiometric titration , titration , hydrolysis , materials science , organic chemistry , polymer , solvent , ion
Well defined ABC triblock copolymers of polystyrene‐ block ‐poly(2‐vinylpyridine)‐ block ‐poly( tert ‐butyl methacrylate) and polystyrene‐ block ‐poly(4‐vinylpyridine)‐ block ‐poly( tert ‐butyl methacrylate) were synthesized by sequential living anionic polymerization in tetrahydrofuran. Triblock copolymers with narrow molecular weight distribution were obtained. Hydrolysis of the poly( tert ‐butyl methacrylate) block yields polystyrene‐ block ‐polyvinylpyridine‐ block ‐poly(methacrylic acid) which demonstrates pH‐dependent solution properties. Interpolymer complexation of the polyvinylpyridine and poly(methacrylic acid) blocks in the micellar solution is studied in dependence of the pH in solution by potentiometric, conductometric and turbidimetric titration, and in bulk by FTIR spectroscopy.