Article
Complexation of Ionomers and Surfactant Molecules of the Same Charge in a Nonpolar Solvent
Macromolecules
(1994)
Abstract
Complexation between sulfonated polystyrene ionomers and bis(2-ethylhexyl) sulfosuccinate
sodium salt (aerosol OT, AOT) surfactant molecules in m-xylene was studied by ultracentrifugation, vapor
pressure osmometry, viscometry, and dynamic light scattering. When the dilute ionomer solution is mixed
with the AOT soluti6n, complexation takes place for both the slightly aggregated state of AOT and reversed
micelles of AOT containing water. In the presence of excess AOT molecules, some of the AOT are free from
the ionomers, and there are well-defined limiting compositions for complexes of the ionomer and AOT and
for those of the ionomer and AOT micelles. The limiting composition depends on the species of the salt or
acid group of the ionomer and on the state of AOT before mixing. The composition was estimated to be
0.21-0.66 reversed AOT micelles per &/acid group for the ionomer-AOT micelle complexes and 14-23 AOT
molecules per &/acid group for the ionomel-AOT complexes. AOT molecules were found to disrupt efficiently
the cluster-forming contacts among &/acid groups, each of them encapsulating a single salt/acid group. The
AOT micelles, however, do not completely disrupt the intrachain aggregation.
Keywords
- Complexation,
- Ionomers,
- Surfactant Molecules,
- Nonpolar Solvent
Disciplines
Publication Date
1994
Citation Information
William MacKnight, Kirill N. Bakeev, Sergey A. Chugunov, Iwao Teraoka, et al.. "Complexation of Ionomers and Surfactant Molecules of the Same Charge in a Nonpolar Solvent" Macromolecules Vol. 27 (1994) p. 3926 - 3932 Available at: http://works.bepress.com/william_macknight/275/