Volumetric and ultrasonic studies of the system (water + polypropylene glycol 400) at temperatures from (283.15 to 313.15) K |
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| Institution: | 1. Centre de Recherche du Centre Hospitalier de l''Université de Montréal (CRCHUM), Montreal, Quebec, Canada;2. Faculté de Pharmacie, Université de Montréal, Montreal, Quebec, Canada;3. Département de Pharmacologie et de Physiologie, Faculté de Médicine, Université de Montréal, Montreal, Quebec, Canada;4. Unité des Troubles du Mouvement André Barbeau, Centre Hospitalier de l''Université de Montréal, Montreal, Quebec, Canada;5. Division of Neurology, Centre Hospitalier de l''Université de Montréal, Montreal, Quebec, Canada;6. Comparative Medicine and Animal Resources Centre, McGill University, Montreal, Quebec, Canada;7. Pharmacotherapy and Translational Research, College of Pharmacy, University of Florida, Lake Nona Campus, Orlando, FL, USA;8. Groupe de Recherche en Pharmacologie Animal du Québec, Département de Biomédecine Vétérinaire, Faculté de Médecine Vétérinaire Université de Montréal, Saint-Hyacinthe, Quebec, Canada |
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| Abstract: | Ultrasonic velocity and density of aqueous solutions of polypropylene glycol have been measured experimentally over the whole range of composition at temperatures T = (283.15 to 313.15) K and atmospheric pressure. From these experimental data, the excess specific volumes, isentropic compressibility, increments of the ultrasonic velocity, and the isentropic compressibility have been determined for each composition. The results have been interpreted in light of polymer–solvent and polymer–polymer interactions. Also, the excess specific volumes, the increments of the ultrasonic velocity, and the isentropic compressibility were fitted to a variable-degree polynomial equation. |
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