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Poly(styrene sulfonate) self‐organization: electrostatic and secondary interactions
Author(s) -
Ahrens H.,
Büscher K.,
Eck D.,
Förster S.,
Luap C.,
Papastavrou G.,
Schmitt J.,
Steitz R.,
Helm C.A.
Publication year - 2004
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200450707
Subject(s) - polyelectrolyte , monolayer , copolymer , adsorption , materials science , hydrophobic effect , electrostatics , amphiphile , polymer , styrene , brush , chemical engineering , surface force , polymer chemistry , chemical physics , chemistry , nanotechnology , organic chemistry , composite material , physics , mechanics , engineering
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: (ι) within amphiphilic diblock copolymer monolayers, a PSS monolayer adsorbs flatly to the hydrophobic block, (ιι) on temperature increase (and with screened electrostatic forces), more PSS is adsorbed onto oppositely charged surfaces, and (ιιι) 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.