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Theory of electrophoretic mobility of a polyelectrolyte in semidilute solutions of neutral polymers
Author(s) -
Muthukumar Murugappan
Publication year - 1996
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/elps.1150170629
Subject(s) - polyelectrolyte , electrophoresis , polymer , chemistry , debye length , chemical physics , chromatography , organic chemistry , ion
An explicit formula is derived for the electrophoretic mobility of a polyelectrolyte molecule in a semidilute solution of neutral polymers in terms of the molecular weight N of a polyelectrolyte, concentration c of neutral polymers, Debye length and solvent quality. The nature of the crossover between different regimes, as c, N , and the salt concentration are varied, is presented. The calculations show that one progressively enters into regimes of no‐separation, separation, and no‐separation in the electrophoresis of polyelectrolytes as c is increased. If c is very high, one returns to the mechanism of separation in gel electrophoresis.