Dilute solution properties of poly(allylammonium chloride) in aqueous sodium chloride solutions

Abstract

Abstract Ten fractions of poly(allylammonium chloride) were investigated at 25°C in sodium chloride solutions of various concentrations, c s , by viscosity and light scattering techniques. The molecular weight ( M w )‐intrinsic viscosity [η] relationships were established at four NaCl concentrations. The unperturbed dimensions estimated from the Stockmayer‐Fixman plot are independent of c s . The second virial coefficient A 2 and the excluded volume parameter B as well as [η] were found to be proportional to c and to have negative values in the limit of infinite c s . In addition, it was found that the electrostatic part of the expansion factor can be expressed in terms of a reduced parameter ( M w / c s ) 1/2 in a fairly wide range of M w and c s .