Thermal transitions and state of water in binary mixtures of water andn-decanephosphonic acid or its sodium salts |
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| Authors: | J F A Soltero J E Puig P C Schulz |
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| Institution: | (1) Departamento de Ingeniería Química, Universidad de Guadalajara, Boul. M. García Barragán # 1451, 44430 Guadalajara, Jal., México;(2) Departamento de Química y de Ingeniería Química, Universidad Nacional del Sur, 8000 Bahía Blanca, Argentina |
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| Abstract: | The state of water and several transitions were examined in the systemsn-decanephosphonic acid (DPA)—water and the sodium salts of DPA—water. Temperature — composition phase diagrams are reported.
The results show that several liquid crystalline phases plus isotropic liquid, and two solid phases (a waxy solid phase and
a crystalline phase) are formed. Several types of water were detected: bulk-like water, interfacial water and hydration water.
This work was supported by the Consejo Nacional de Ciencia y Technología de México (grant # 3319-E) and by the Consejo Nacional
de Investigaciones Científicas y Técnicas de la República de Argentina. |
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| Keywords: | alkanephosphonic acid DSC thermal transitions phase behavior |
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