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Aseyev, V.O.; Tenhu, Heikki; Klenin, S.I.
Polymer (Guilford), 03/1999, Letnik: 40, Številka: 5Journal Article
The effect of the solvent composition on the conformation of a super high molar mass polyelectrolyte, M w=22–25×10 6, dissolved in a water–acetone mixture was investigated using static and dynamic light scattering. When increasing the concentration of acetone above 80 mass percent, a reversible conformational change of macromolecules occurs, which causes a sharp decrease in the viscosity, a rise in the light scattering intensity, and also a decrease in the radius of gyration, R g, the hydrodynamic radius, R h, as well as in the second virial coefficient A 2. The correlation function measured by dynamic light scattering changes from bimodal to unimodal indicating the formation of compact globular structures.
