Reference : Tuning of the exchange dynamics of unimers between block copolymer micelles with tempera...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/12714
Tuning of the exchange dynamics of unimers between block copolymer micelles with temperature, cosolvents, and cosurfactants
English
van Stam, Jan [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Creutz, Serge [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
De Schryver, Frans C [Katholieke Universiteit Leuven (KUL) > Department of Chemistry > > >]
Jérôme, Robert mailto [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
22-Aug-2000
Macromolecules
Amer Chemical Soc
33
17
6388-6395
Yes (verified by ORBi)
International
0024-9297
Washington
[en] self-assembly in solution ; micelle ; stimuli responsive micelle
[en] The dynamics of unimer exchange between aqueous micelles, formed by two amphiphilic block copolymers, i.e., poly(styrene-b-sodium methacrylate) and poly(tert-butylstyrene-b-sodium methacrylate), has been investigated by steady-state fluorescence spectroscopy. The kinetics are so slow at room temperature that no exchange could be detected over several hours, while at 60 °C the exchange rate constants could be estimated. These results corroborate our previous findings that the rate is slowed down by increasing the hydrophobicity of the core. In addition to the temperature, the exchange can also be tuned by the addition of either a cosolvent or a cosurfactant. The efficiency of these additives to speed up the exchange process is related to their water solubility and their compatibility with the hydrophobic core of the micelles. The most pronounced effect on the exchange process is observed when the water solubility is low and the mixing of the additive with the hydrophobic core is favorable.
Center for Education and Research on Macromolecules (CERM)
Akzo Nobel N.V. ; Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; Politique Scientifique Fédérale (Belgique) = Belgian Federal Science Policy
Researchers
http://hdl.handle.net/2268/12714
10.1021/ma992174a
http://pubs.acs.org/doi/pdf/10.1021/ma992174a

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