ORBi: Gohy Jean-François - pH-Dependence of the morphology of micelles formed by poly(2-vinylpyridine)-block-poly(ethylene oxide) copolymers in water

Reference : pH-Dependence of the morphology of micelles formed by poly(2-vinylpyridine)-block-poly(e...


	Document type :	Scientific journals : Article
	Discipline(s) :	Engineering, computing & technology : Materials science & engineering Physical, chemical, mathematical & earth Sciences : Chemistry
	To cite this reference:	http://hdl.handle.net/2268/9145

Title :	pH-Dependence of the morphology of micelles formed by poly(2-vinylpyridine)-block-poly(ethylene oxide) copolymers in water
Language :	English
Author, co-author :	Gohy, Jean-François [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
	Mores, Sandrine [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
	Varshney, Sunil K [Polymer Source, Dorval, Canada > > > >]
	Zhang, Jian-Xin [Polymer Source, Dorval, Canada > > > > > >]
	Jérôme, Robert [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Publication date :	26-Apr-2002
Journal title :	e-Polymers
Publisher :	European Polymer Federation
Issue/season :	21
Pages :	1-8
Audience :	International
ISSN :	1618-7229
City :	Strasbourg
Keywords :	[en] self-assembly in solution ; micelle ; stimuli responsive micelle
Abstract :	[en] The morphology of micelles formed by two poly(2-vinylpyridine)-block-poly(ethylene oxide) (P2VP-b-PEO) copolymers has been studied in phosphate-buffered water by dynamic light scattering and transmission electron microscopy. Spherical micelles are observed when the P2VP block is the minor component of the diblock copolymer. When P2VP dominates the composition, transition from spheres-to-rods-to-vesicles takes place in a narrow pH range that straddles the pKa of P2VP. This transition is controlled by the degree of protonation of the P2VP blocks. At high pH, the copolymer precipitates from the solution.
Research units :	Center for Education and Research on Macromolecules (CERM)
Funders :	Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; Politique Scientifique Fédérale (Belgique) = Belgian Federal Science Policy ; The European Science Foundation (ESF) in the frame of the SUPERNET program
Target :	Researchers
Permalink :	http://hdl.handle.net/2268/9145
Other URL :	http://www.e-polymers.org/journal/list.cfm#

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