Summary
Shear and concentration dependent flow studies on solutions of a narrow molecular weight fraction of 90.3 % hydrolysed polyvinylalcohol are reported, together with precise density measurements on these same solutions. From the derived flowing volume and partial molar volume values it is concluded that two association processes occur; the first appears similar to micellization of surfactants, the second is association of ‘micellar spheres’.
Zusammenfassung
Es wurde die Scher- und Konzentrationsabhängigkeit des Fließverhaltens von Polyvinylalkohollösungen (90,3 % hydrolysiert) mit niedriger Polydispersität untersucht. An den gleichen Lösungen wurden auch Präzisionsdichtemessungen ausgeführt. Aus dem berechneten Fließvolumen und dem partiellen Molvolumen kann gefolgert werden, daß zwei Assoziationsprozesse vorliegen. Der erste davon gleicht der Mizellbildung von Tensiden, der zweite entspricht der Assoziation kugelförmiger Mizellen.
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Eagland, D., Wardlaw, G.C. & Thorn, I. Particle-macromolecule interactions in aqueous solutions Part 1: Solution and flow behaviour of polyvinylalcohol in an aqueous medium. Colloid & Polymer Sci 256, 1073–1078 (1978). https://doi.org/10.1007/BF01638297
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DOI: https://doi.org/10.1007/BF01638297