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Biblioteca Digital - Universidad de Chile
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Partial molar volume of anionic polyelectrolytes in aqueous solution

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2007
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Salamanca, Constain
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Partial molar volume of anionic polyelectrolytes in aqueous solution
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  • Salamanca, Constain;
  • Contreras, Martín;
  • Gamboa, Consuelo;
Abstract
In this work the partial molar volumes (V) of different anionic polyelectrolytes and hydrophobically modified polyelectrolytes (PHM) were measured. Polymers like polymaleic acid-co-styrene, polymaleic acid-co-1-olefin, polymaleic acid-co-vinyl-2-pyrrolidone, and polyacrylic acid (abbreviated as MAS-n, PA-n-K-2, AMVP, and PAA, respectively) were employed. These materials were investigated by density measurements in highly dilute aqueous solutions. The molar volume results allow us to discuss the effect of the carboxylic groups and the contributions from the comonomeric principle chain. The PAA presents the smaller V, while the largest V value was for AMVP. The V of PHM shows a linear relationship with the number of methylene groups in the lateral chain. It is found that the magnitude of the contribution per methylene group decreases as the hydrophobic character of the environment increases. (C) 2006 Elsevier Inc. All rights reserved.
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URI: https://repositorio.uchile.cl/handle/2250/118701
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JOURNAL OF COLLOID AND INTERFACE SCIENCE Vol. 309 01/05/2015 2007 2 435-439
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