Shape transformation of poly(butadiene)-b-poly(ethyleneoxide) plus DTAB compound micelles in aqueous solutions

The micellar shape of Poly(butadiene)‐b‐poly(ethyleneoxide) (PB‐PEO) plus Dodecyltrimethylammoniumbromide (DTAB) compound micelles was investigated by light scattering, small‐angle X‐ray scattering and small‐angle neutron scattering in dependence of the molar ratio between block copolymer and surfac...

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Bibliographic Details
Published in:Macromolecular symposia. 2000-12, Vol.162 (1), p.291-306
Main Authors: Egger, Holger, Nordskog, Anette, Lang, Peter, Brandt, Astrid
Format: Article
Language:English
Subjects:
Aggregates
Aqueous solutions
Block copolymers
Lead (metal)
Micelles
Neutron scattering
Transformations
Transforms
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Summary:The micellar shape of Poly(butadiene)‐b‐poly(ethyleneoxide) (PB‐PEO) plus Dodecyltrimethylammoniumbromide (DTAB) compound micelles was investigated by light scattering, small‐angle X‐ray scattering and small‐angle neutron scattering in dependence of the molar ratio between block copolymer and surfactant. The given block copolymer forms cylindrical micelles in binary aqueous solution, which transform to spherical aggregates upon the addition of a sufficiently high amount of DTAB. It is interesting to note that the micellar shape seems to be a bistable feature, in the sense that it depends not only on the molar ratio of BCP and DTAB but also in a predictable manner on the preparation procedure of the solution.
ISSN:1022-1360
1521-3900
DOI:10.1002/1521-3900(200012)162:1<291::AID-MASY291>3.0.CO;2-U