Studies on styrene phosphonic acid |
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Authors: | P. C. Schulz B. S. Fernández-Band B. Vuano M. Palomeque A. L. Allan |
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Affiliation: | (1) Department of Chemistry and Chemical Engineering, Universidad Nacional del Sur, 8000 Bahia Blanca, Argentina |
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Abstract: | Some properties of styrene phosphonic acid (SPA) were studied. The crystals were triclinic, witha=0.6434 nm,b=0.5842 nm,c=2.0338 nm, =96.17°, =97.33°, =79.65° andZ=4. SPA underwent a change in crystal structure at 78.8°C, the hydrocarbon network became disordered (liquid-like) at 138.5°C. Crystals melted at 148.6°C giving a cubic mesophase, then changed to an isotropic liquid at 155.6°C and at 162.13°C SPA underwent decomposition. Values for pK1=2.15 and pK2=7.66 were obtained at 25°C. The water solubility of SPA at several temperatures, and its interaction with surfactant micelles were determined. |
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Keywords: | Styrene phosphonic acidcrystals micelle solubilization solubility |
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