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Size‐based separation of synthetic polyelectrolytes in entangled polymer solution capillary electrophoresis: The effect of binary mixtures of separating polymers differing in molecular mass
Author(s) -
Cottet Hervé,
Gareil Pierre
Publication year - 2002
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/1522-2683(200208)23:16<2788::aid-elps2788>3.0.co;2-c
Subject(s) - molecular mass , polymer , ethylene oxide , chemistry , polyelectrolyte , viscosity , mass distribution , intrinsic viscosity , chromatography , electrophoresis , chemical physics , materials science , chemical engineering , thermodynamics , organic chemistry , copolymer , physics , quantum mechanics , galaxy , enzyme , engineering
The influence on the electrophoretic behavior of polystyrenesulfonates of the percentage of high‐molecular‐mass chains in an entangled poly(ethylene oxide) solution having a bimodal molecular mass distribution has been investigated and compared with the results obtained for similar solutions of unimodal molecular mass distribution. The comparisons between the different separating polymer solutions were made at a constant total mass concentration, so as to keep constant the mesh size and to highlight the sole effect of the network dynamics. The use of binary polymer mixtures of two different molecular masses but of same nature can be a convenient alternative to modulate the dynamics of the network and the viscosity of the separating medium. A 20–30% content of high – molecular – mass chains in an entangled poly(ethylene oxide) solution having a binary molecular mass distribution appears to be a good compromise for a moderate viscosity and a good separation selectivity in comparison with a solution containing only chains of high molecular mass at the same concentration.