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pH‐Dependent Behavior of Hydrophobically Modified Polyelectrolyte Shells of Polymeric Nanoparticles
Author(s) -
Procházka Karel,
Matějíček Pavel,
Uchman Mariusz,
Štěpánek Miroslav,
Humpolíčková Jana,
Hof Martin,
Špírková Milena
Publication year - 2008
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200851313
Subject(s) - polyelectrolyte , poly(methacrylic acid) , methacrylic acid , nanoparticle , polystyrene , aqueous solution , chemical engineering , molar mass , polymer chemistry , shell (structure) , materials science , chemistry , copolymer , polymer , nanotechnology , composite material , engineering
Summary: The self‐assembled core‐shell nanoparticles based on fluorescently double‐tagged high‐molar‐mass polystyrene‐ block ‐poly(methacrylic acid), PS‐PMA, were prepared in aqueous buffers by dialysis from 1,4‐dioxane – water mixtures. The conformations of shell‐forming PMA chains were studied using nonradiative excitation energy transfer measurements. The study shows that two populations of distinctly different conformations (collapsed and stretched) coexist in the shell and their ratio depends on pH.