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Synthesis and solution properties of rodlike polyelectrolytes
Author(s) -
Wittemann Matthias,
Kelch Steffen,
Blaul Jürgen,
Hickl Peter,
Guilleaume Birgit,
Brodowski Gisela,
Horvath Andreas,
Ballauff Matthias,
Rehahn Matthias
Publication year - 1999
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.19991420107
Subject(s) - polyelectrolyte , counterion , small angle x ray scattering , polymer chemistry , chemistry , osmometer , polymer , phenylene , cationic polymerization , polymerization , aqueous solution , scattering , chemical engineering , materials science , organic chemistry , ion , optics , physics , engineering
The synthesis and the solution behavior of rigid, rodlike cationic polyelectrolytes having (i) poly( p ‐phenylene) backbones and ( ii ) main chains composed of 4,4“‐bis(2,2′:6′,2”‐terpyridine)2′,5′‐dihexyl‐ p ‐terphenyl moieties and ruthenium(II) centers are presented. All these polymers are shown to have a homogeneous constitution and degrees of polymerization of up to P n ≈ 70. Their solution properties were analyzed using viscosimetry, small‐angle X‐ray scattering (SAXS) and osmometry. Pronounced polyelectrolyte effects were found in salt‐free solutions using viscosimetry. Small‐angle X‐ray scattering demonstrated directly the strong correlation of the counterions and the macroions. The osmotic coefficients measured in salt‐free solution as function of polyelectrolyte concentration were found to be lower than predicted by the cell model.