Abstract
The specific Cotton-Mouton constant of water solutions of PSS-Na + of different molecular weight have been measured at concentrations below 2% in the absence and presence of added salt. A bare persistence length q=12 A ̊ is found from the high ionic-strength molecular weight and concentration independent value. The molecular weight and concentration dependence at low ionic-strength is discussed in terms of the electrostatic contribution to the persistence length and the structure of semidilute polyelectrolyte solutions.
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