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Electrical Mobility of Counterions in Polyelectrolyte Solutions
Author(s) -
Shavit Nehemia
Publication year - 1973
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.197300025
Subject(s) - counterion , chemistry , polyelectrolyte , conductance , potassium , aqueous solution , sodium , osmotic coefficient , sodium polyacrylate , electrophoresis , polymer , ion , analytical chemistry (journal) , activity coefficient , chromatography , organic chemistry , raw material , mathematics , combinatorics
Electrical mobilities of counterions in aqueous solutions of potassium polyacrylate, potassium polymethacrylate and sodium polymethacrylate were investigated by moving boundary electrophoresis. At constant polymer concentration, the mobility of counterions decreases with an increase in the degree of neutralization. At a constant degree of neutralization, the mobility increases with an increase in the concentration of the polyelectrolyte. The mobilities of the polyion were derived from the counterion mobility and conductance. The fraction of bound ions increases with the degree of neutralization and reaches a value of about 60%. Osmotic coefficients were evaluated from the mobility data and compared with the values derived from osmotic measurements.