Coassembly of poly(ethylene oxide)-block-poly(methacrylic acid) and N-dodecylpyridinium chloride in aqueous solutions leading to ordered micellar assemblies within copolymer aggregates

0380837 - ÚMCH 2013 RIV US eng J - Journal Article
Uchman, M. - Štěpánek, M. - Prevost, S. - Angelov, Borislav - Bednár, J. - Appavou, M.-S. - Gradzielski, M. - Procházka, K.
Coassembly of poly(ethylene oxide)-block-poly(methacrylic acid) and N-dodecylpyridinium chloride in aqueous solutions leading to ordered micellar assemblies within copolymer aggregates.
Macromolecules. Roč. 45, č. 16 (2012), s. 6471-6480. ISSN 0024-9297. E-ISSN 1520-5835
R&D Projects: GA ČR GAP208/10/0353; GA ČR GCP205/11/J043
Institutional research plan: CEZ:AV0Z40500505
Keywords : CryoTEM electron microscopy * SAXS * soft matter
Subject RIV: CD - Macromolecular Chemistry
Impact factor: 5.521, year: 2012

Formation of polyelectrolyte−surfactant (PE−S) complexes of poly(ethylene oxide)-block-poly(methacrylic acid) (PEO705−PMAA476) and N-dodecylpyridinium chloride (DPCl) in aqueous solution was studied by static and dynamic light scattering (SLS, DLS), small-angle neutron scattering (SANS), small-angle X-ray scattering (SAXS), and cryogenic transmission electron microscopy (cryo-TEM). While it was found previously [Macromolecules 1997, 30, 3519] by microcalorimetric titration that in a similar system (PEO176−PMAA186) crystallization of aliphatic tails of N-dodecylpyridinium bromide did not occur, in our system it was evidenced by SAXS that upon addition of DPCl to fully ionized PEO705−PMAA476 the ordered arrangement of the surfactant occurs in a certain range of PEO705−PMAA476 concentrations and surfactant-to-polyelectrolyte charge molar ratio.
Permanent Link: http://hdl.handle.net/11104/0007144