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. 2009 Oct 19;10(11):2968–2975. doi: 10.1021/bm900373c

Scheme 1. Representation of all Types of Charge Compensation in a Water-Rinsed PSS/PDADMA Complex.

Scheme 1

Ionic crosslinks are paired polyelectrolyte repeat units. Doping sites are reversibly formed extrinsic charges according to eq 1. Trapped doping sites are extrinsic sites where the polyelectrolyte charges cannot pair because of kinetic constraints on reorganizing polymer chains. Nonstoichiometric extrinsic charge results from non-1:1 stoichiometry of polyelectrolytes in the complex. In this case, PSS is in excess.