Collapse of poly(methacryloylethyl trimethylammonium methylsulfate) on addition of acetone into an aqueous solution

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 conf...

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Bibliographic Details
Published in:Polymer (Guilford) 1999-03, Vol.40 (5), p.1173-1180
Main Authors: Aseyev, V.O., Tenhu, Heikki, Klenin, S.I.
Format: Article
Language:English
Subjects:
Coil–globule transition
Polyelectrolyte
Water–acetone mixture
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Summary: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.
ISSN:0032-3861
1873-2291
DOI:10.1016/S0032-3861(98)00270-5