Characterization of synthetic polyelectrolytes by capillary electrophoresis

Capillary electrophoresis in entangled polymer solutions was applied to determine the molecular mass and polydispersity of polyelectrolytes. The separation selectivities of different polyethylene glycols as buffer additive can be correlated to their average molecular mass. A universal curve correlat...

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Bibliographic Details
Published in:Journal of Chromatography A 2000-10, Vol.894 (1), p.105-116
Main Authors: Grosche, Oliver, Bohrisch, Jörg, Wendler, Ulrich, Jaeger, Werner, Engelhardt, Heinz
Format: Article
Language:English
Subjects:
Analytical chemistry
Applied sciences
Buffers
Chemistry
Chromatographic methods and physical methods associated with chromatography
Electrolytes - chemistry
Electrophoresis, Capillary - methods
Exact sciences and technology
Organic polymers
Other chromatographic methods
Physicochemistry of polymers
Polybetaines
Polymers
Polyvinylpyridines
Properties and characterization
Structure, morphology and analysis
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Summary:Capillary electrophoresis in entangled polymer solutions was applied to determine the molecular mass and polydispersity of polyelectrolytes. The separation selectivities of different polyethylene glycols as buffer additive can be correlated to their average molecular mass. A universal curve correlating the selectivity and the molecular mass could be obtained by using the instrinsic viscosity of the polyethylene glycol. The separation of poly(2-vinylpyridine) standards was compared to the separation of poly(4-vinylpyridine) standards. An indirect detection system was developed to characterize the cationic polyelectrolyte polydiallyldimethyl ammonium chloride. Various polymers with oppositely charged groups (polycarboxybetaines) were investigated with respect to structure dependence, pH dependence and molecular mass dependence of inter- and intramolecular association.
ISSN:0021-9673
DOI:10.1016/S0021-9673(00)00774-3