Volumetric Properties of Poly (Vinyl Alcohol, Vinyl Sulfate Ester Salt) Polyelectrolytes in Salt Free Aqueous Solutions

• Published in: Journal of dispersion science and technology Vol. 24; no. 1; pp. 43 - 51
• Main Authors: Horváth-Szabó, Géza, Nagy, Miklós, Høiland, Harald, Maham, Yadollah
• Format: Journal Article
• Language: English
• Published: Philadelphia, PA Taylor & Francis Group 02.01.2003; Taylor & Francis
• Subjects: Apparent molar volume; Applied sciences; Association; Chemical thermodynamics; Chemistry; Copolymer; Exact sciences and technology; General and physical chemistry; Hydrophotic hydration; Mixtures; Molar compressibility; Organic polymers; Partial molar volume; Physicochemistry of polymers; Poly vinyl alcohol; Polyelectrolyte; Properties and characterization; PVA; Solution and gel properties; Thermodynamic properties; Ultrasound velocity; Vinyl sulfate ester; Compressibility; Molecular structure; Molar volume; Density; Poly vinyl alcohol; Sound velocity; Sulfonate copolymer; Association; Ultrasound velocity; Partial molar volume; Molecular association; Acid copolymer; Apparent molar volume; Copolymer; Molar compressibility; Partial molar quantity; Vinyl alcohol copolymer; Experimental study; Polyelectrolyte; Hydrophotic hydration; Vinyl sulfate ester; Preparation; Apparent quantity; PVA; Aqueous solution; Thermodynamic properties
• ISSN: 0193-2691; 1532-2351
• DOI: 10.1081/DIS-120017942

Sharp break points in the apparent molar volume and compressibility functions of poly (vinyl alcohol co-vinyl sulfate sodium salt) copolymers were found in the 0.01-0.03 molal-segment concentration range in aqueous solution. Both apparent molar volume and compressibility increase linearly with concentration below the break point, while they show saturation type characteristic above the break point. The position of break point is independent of the vinyl-sulfate/(vinyl-sulfate and vinyl-alcohol) group-ratio of the polyelectrolyte. An association process between the individual polyelectrolyte molecules is suggested for the interpretation of break points. The partial molar volumes at infinite dilution depend linearly on the vinyl sulfate sodium salt group content. The partial molar volume contribution of (vinyl sulfate sodium salt)-group and (vinyl alcohol)-group were determined from concentration ranges corresponding to both the associated and non-associated state of the polyelectrolyte salt.