Article (Scientific journals)
Morphology of core-shell-corona aqueous micelles: II. Addition of core-forming homopolymer
Lei, Liangcai C; Gohy, Jean-François; Willet, Nicolas et al.
2004In Polymer, 45 (13), p. 4375-4381
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Keywords :
self-assembly in solution; micelle; stimuli responsive micelle
Abstract :
[en] The poly(styrene)-block-poly(2-vinylpyridine)-block-poly(ethylene oxide) triblock copolymer PS200-b-P2VP(140)-b-PEO590, where the subscripts refer to the number average degrees of polymerization, forms spherical micelles in water, that consist of a PS core, a pH-responsive P2VP shell and a PEO corona. This triblock has been added with homo-PS before micellization in order to increase the volume fraction of the core-forming block. The length of the added homo-PS has been varied with respect to the length of the PS core-forming block: much shorter, much longer and approximately the same. The structure of the micelles has been investigated by transmission electron microscopy, static and dynamic light scattering. Homo-PS phase separates whenever its length is larger than the one of the PS core-forming chains; otherwise this phenomenon occurs beyond a critical concentration that depends on molecular weight. The addition of homo-PS has no influence on the morphology of the micelles and on the characteristic size of both the PS core and the P2VP shell, although the hydrodynamic diameter of the micelles is decreased. Substitution of styrene for homopolystyrene results in transition from a spherical to a dominant rod-like morphology. (C) 2004 Published by Elsevier Ltd.
Research center :
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Chemistry
Materials science & engineering
Author, co-author :
Lei, Liangcai C;  Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Gohy, Jean-François;  Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Willet, Nicolas ;  Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Zhang, Jian-Xin;  Polymer Source, Dorval, Canada
Varshney, Sunil;  Polymer Source, Dorval, Canada
Jérôme, Robert ;  Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Language :
English
Title :
Morphology of core-shell-corona aqueous micelles: II. Addition of core-forming homopolymer
Publication date :
03 June 2004
Journal title :
Polymer
ISSN :
0032-3861
eISSN :
1873-2291
Publisher :
Elsevier Sci Ltd, Oxford, United Kingdom
Volume :
45
Issue :
13
Pages :
4375-4381
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
SUPERNET program
Funders :
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
ESF - European Science Foundation [FR]
Commentary :
The authors acknowledge Polymer (Elsevier) for allowing them to archive this paper.
Available on ORBi :
since 19 January 2009

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