bei Google ScholarTitelangaben
Ahrens, Heiko ; Buscher, K. ; Eck, D. ; Förster, Stephan ; Luap, C. ; Papastavrou, Georg ; Schmitt, J. ; Steitz, R. ; Helm, Christiane A.:
Poly(styrene sulfonate) self-organization : Electrostatic and secondary interactions.
In: Macromolecular Symposia.
Bd. 211
(2004)
Heft 1
.
- S. 93-106.
ISSN 1521-3900
DOI: https://doi.org/10.1002/masy.200450707
Abstract
We investigate the self-organization of PSS in brushes and polyelectrolyte multilayers with X-ray, neutron and optical reflectivity. The electrostatic force dominates brush phases and adsorption behavior, additionally we find evidence of a strong hydrophobic force: (i) within amphiphilic diblock copolymer monolayers, a PSS monolayer adsorbs flatly to the hydrophobic block, (ii) on temperature increase (and with screened electrostatic forces), more PSS is adsorbed onto oppositely charged surfaces, and (iii) a polyelectrolyte multilayers shrinks when heated at 100 r.h. The latter two effects are consistent with the well-known increase of the hydrophobic force on heating: The increased PSS surface coverage can be attributed to deteriorating solvent conditions. Within a polyelectrolyte multilayer, an increase of the hydrophobic force maximizes the local contact of hydrophobic polymer segments, causing a reduction of swelling and an increased mass density.