Reference : Dynamics of poly((dimethylamino)alkyl methacrylate-block-sodium metha-crylate) micell...
Scientific journals : Article
Engineering, computing & technology : Materials science & engineering
Physical, chemical, mathematical & earth Sciences : Chemistry
http://hdl.handle.net/2268/15015
Dynamics of poly((dimethylamino)alkyl methacrylate-block-sodium metha-crylate) micelles. Influence of hydrophobicity and molecular architecture on the exchange rate of copolymer molecules
English
Creutz, Serge [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Van Stam, Jan [Katholieke Universiteit Leuven (KUL) > Department of Chemistry > Afdeling voor Spectroscopie en Fotochemie > >]
De Schrijver, Frans C [Katholieke Universiteit Leuven (KUL) > Department of Chemistry > Afdeling voor Spectroscopie en Fotochemie > >]
Jérôme, Robert mailto [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
10-Feb-1998
Macromolecules
Amer Chemical Soc
31
3
681-689
Yes (verified by ORBi)
International
0024-9297
Washington
[en] self-assembly in solution ; micelle
[en] The dynamic stability of the micellar aggregates formed by amphiphilic block copolymers, i.e., poly((dimethylamino)alkyl methacrylate-b-sodium methacrylate), has been investigated by steady-state fluorescence spectroscopy and size exclusion chromatography. The dynamics of exchange of block copolymer molecules between the micelles, formed in aqueous solution, depend on a manifold of factors, e.g., alkyl substituent in the hydrophobic block, the relation between the hydrophobic and hydrophilic blocks, and the architecture of the block copolymer. All copolymers investigated show a slow unimer exchange with an exchange rate constant on the order of 10-3 s-1, with a difference of a factor of 20 between the fastest and the slowest exchange. It is possible to tune the exchange rate in a controlled way; for instance, an extension or branching of the alkyl chain slows down the exchange rate. The same effect is observed when the hydrophobic/hydrophilic balance of these copolymers is increased or when either the hydrophilic or the hydrophobic moiety of diblocks is divided into two external blocks, leading to a triblock copolymer.
Center for Education and Research on Macromolecules (CERM)
Akzo Nobel N.V. ; The K. U. Leuven for a postdoctoral grant ; 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/2268/15015
10.1021/ma970987y
http://pubs.acs.org/doi/pdf/10.1021/ma970987y

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Restricted access
Creutz S 1998 Macromolecules 681.pdfPublisher postprint123.39 kBRequest copy

Bookmark and Share SFX Query

All documents in ORBi are protected by a user license.