Measurement of Boundaries between Two-Phase and Three-Phase Regions in Emulsified Systems by Titration Calorimetry
| Autor: | Gary L. Covatch, Duane H. Smith |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Phase boundary
Chromatography Ternary numeral system Chemistry Analytical chemistry Mineralogy Thermodynamics Calorimetry Atmospheric temperature range Surfaces Coatings and Films Electronic Optical and Magnetic Materials Biomaterials chemistry.chemical_compound Colloid and Surface Chemistry Phase (matter) Microemulsion Titration Energy source Tetradecane Phase diagram |
| Zdroj: | Journal of Colloid and Interface Science. 171:112-116 |
| ISSN: | 0021-9797 |
| DOI: | 10.1006/jcis.1995.1156 |
| Popis: | It has been demonstrated that isoperibolic titration calorimetry can be used to determine the tie-triangles (i.e., compositions of conjugate top, middle, and bottom phases) of amphiphile/oil/water systems. Simple regressions to temperatures, heats, or their respective derivatives, measured as a function of system composition, gave multiple compositional points on each side of the tie-triangle. An equation for each side then was calculated from a regression to the respective set of compositional points. Finally, phase compositions were obtained by solving the equations for the respective sides of the tie-triangle for their three points of intersection. No dependence of the phase boundary points on the morphologies of the emulsions was found. Densities of 2-butoxyethanol from 24 to 50°C also are reported. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect