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  Self-assembly of polyelectrolyte rods in polymer gel and in solution: Small-angle neutron scattering study

Zaroslov, Y. D., Gordeliy, V. I., Kuklin, A. I., Islamov, A. H., Philippova, O. E., Khokhlov, A. R., et al. (2002). Self-assembly of polyelectrolyte rods in polymer gel and in solution: Small-angle neutron scattering study. Macromolecules, 35(11), 4466-4471.

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Zaroslov, Y. D., Autor
Gordeliy, V. I., Autor
Kuklin, A. I., Autor
Islamov, A. H., Autor
Philippova, O. E., Autor
Khokhlov, A. R., Autor
Wegner, Gerhard1, Autor           
Affiliations:
1MPI for Polymer Research, Max Planck Society, ou_1309545              

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 Zusammenfassung: Self-aggregation of rigid-rod poly(sodium p-phenylenesulfonate) in aqueous solution and inside water-swollen polyacrylamide gel was studied by small-angle neutron scattering. It was shown that both inside the hydrogel and in solution polyelectrolyte rods self-assemble into cylindrical aggregates having eight to nine single polymer chains in the cross-section, the chains being aligned parallel to the axis of the aggregate. The length of these aggregates is much higher than the contour length of a single chain. Gels with embedded rods were studied by contrast variation method in order to examine separately the scattering by the gel and by the rods. Two important observations were made. First, it was shown that the ordering of the rods in the gel resembles that in solution. Second, it was shown that the gel itself is more homogeneous in the presence of rods. Most probably, this effect is due to mobile counterions of rods, which counteract the formation of spatial inhomogeneities in the network during synthesis, because in an inhomogeneous network mobile counterions should be also distributed nonuniformly that is associated with significant translational entropy losses.

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Sprache(n): eng - English
 Datum: 2002-05-21
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Keine Begutachtung
 Identifikatoren: eDoc: 28478
ISI: 000175728100035
 Art des Abschluß: -

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Titel: Macromolecules
  Alternativer Titel : Macromolecules
Genre der Quelle: Zeitschrift
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Affiliations:
Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 35 (11) Artikelnummer: - Start- / Endseite: 4466 - 4471 Identifikator: ISSN: 0024-9297