[en] A poly(vinyl alcohol)-block-poly(acrylic acid)-block-poly(4-vinylpyridine) triblock terpolymer (PVOH-b-PAA-b-P4VP) is prepared by hydrolyzing a poly(vinyl acetate)-block-poly(acrylonitrile)-block-poly(4-vinylpyridine) precursor (PVAc-b-PAN-b-P4VP) synthesized by a combination of cobalt-mediated radical polymerization (CMRP) and nitroxide mediated polymerization (NMP). The PVOH-b-PAA-b-P4VP terpolymer is further micellized in water and the accordingly obtained micellar structures are characterized by a combination of dynamic light scattering (DLS) and cryo-transmission electron microscopy (cryo-TEM) as a function of pH. Well-defined micelles are observed in the whole pH range except for pH values below 4.5 where non-aggregated chains (unimers) are present. The formation of micelles can be rationalized by the formation of insoluble PAA/P4VP inter-polyelectrolyte complexes in the 4.5–6 pH range while hydrophobic P4VP cores are observed at pH values above 6. Finally, the effect of the addition of different salts on the micellar characteristic features is investigated.
Research Center/Unit :
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Chemistry Materials science & engineering
Author, co-author :
Poggi, Elio; Université catholique de Louvain (UCL), Institute of Condensed Matter and Nanosciences, Bio and Soft Matter
Guerlain, Claire; Université catholique de Louvain (UCL), Institute of Condensed Matter and Nanosciences, Bio and Soft Matter
Debuigne, Antoine ; University of Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Detrembleur, Christophe ; University of Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Gigmes, Didier; University of Aix-Marseille, France, CNRS, Institut de Chimie Radicalaire, UMR 7273
Hoeppener, Stephanie; Friedrich Schiller University Jena and Jena Center for Soft Matter, Germany, Laboratory of Organic and Macromolecular Chemistry
Schubert, Ulrich S.; Friedrich Schiller University Jena and Jena Center for Soft Matter, Germany, Laboratory of Organic and Macromolecular Chemistry
Fustin, Charles-André; Université catholique de Louvain (UCL), Institute of Condensed Matter and Nanosciences, Bio and Soft Matter
Gohy, Jean-François; Université catholique de Louvain (UCL), Institute of Condensed Matter and Nanosciences, Bio and Soft Matter
Language :
English
Title :
Stimuli-responsive behavior of micelles prepared from a poly(vinyl alcohol)-block-poly(acrylic acid)-block-poly(4-vinylpyridine) triblock terpolymer
Publication date :
January 2015
Journal title :
European Polymer Journal
ISSN :
0014-3057
eISSN :
1873-1945
Publisher :
Elsevier Science
Volume :
62
Pages :
418-425
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique The ESF for the P2M program
