Sorption of Water by Polyacrylic Acid

A. A. Borisevich, A. E. Chalyh, G. S. Kulagina, and V. K. Gerasimov

Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences,

Leninskii pr. 31, Moscow, 117071 Russia

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Received March 20, 2009

Abstract — The interaction of polyacrylic acid with water is reported. Water, which is consumed by polyacrylic acid in a wide range of humidities is found to exist in two states, i.e., statistically dissolved in the matrix (Flory-Huggins mode) and in cluster form. No retention due to the sorption on active sites according to Langmuir’s mode is detected.