Tuning of the exchange dynamics of unimers between block copolymer micelles with temperature, cosolvents, and cosurfactants

van Stam, Jan; Creutz, Serge; De Schryver, Frans C; Jérôme, Robert

doi:10.1021/ma992174a

Article (Scientific journals)

Tuning of the exchange dynamics of unimers between block copolymer micelles with temperature, cosolvents, and cosurfactants

van Stam, Jan; Creutz, Serge; De Schryver, Frans C et al.

2000 • In Macromolecules, 33 (17), p. 6388-6395

Peer Reviewed verified by ORBi

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https://hdl.handle.net/2268/12714

DOI
10.1021/ma992174a

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Keywords :

self-assembly in solution; micelle; stimuli responsive micelle

Abstract :

[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.

Research Center/Unit :

Center for Education and Research on Macromolecules (CERM)

Disciplines :

Chemistry
Materials science & engineering

Author, co-author :

van Stam, Jan; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)

Creutz, Serge; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)

De Schryver, Frans C; Katholieke Universiteit Leuven (KUL) > Department of Chemistry

Jérôme, Robert ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)

Language :

English

Title :

Tuning of the exchange dynamics of unimers between block copolymer micelles with temperature, cosolvents, and cosurfactants

Publication date :

22 August 2000

Journal title :

Macromolecules

ISSN :

0024-9297

eISSN :

1520-5835

Publisher :

Amer Chemical Soc, Washington, United States - Washington

Volume :

Issue :

Pages :

6388-6395

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://pubs.acs.org/doi/pdf/10.1021/ma992174a

Funders :

Akzo Nobel
F.R.S.-FNRS - Fonds de la Recherche Scientifique
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique

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since 14 May 2009

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