TEMPERATURE-DEPENDENCE OF EMULSION MORPHOLOGIES AND THE DISPERSION MORPHOLOGY DIAGRAM .3. INVERSION HYSTERESIS LINES FOR EMULSIONS OF MIDDLE AND BOTTOM PHASES OF THE SYSTEM C6H13(OC2H4)(2)OH N-TETRADECANE/WATER/

The morphologies and phase volume fractions at which inversion occurre d for (macro)emulsions formed by the middle-phase microemulsion (M) an d water-rich bottom phase (B) were determined by means of electrical c onductivity measurements for the amphiphile/oil/''water'' system C6H13 (OC2H4)(2)OH/n-tetradecane/aqueous 10 mM NaCl at temperatures from 25 degrees C down to 12 degrees C, near the lower critical end-point temp erature (T-lc = 10.4 degrees C). The M/B and B/M morphologies and thei r inversion hysteresis lines conformed to the previously postulated di spersion morphology diagram; that is, within experimental uncertaintie s, the two emulsion inversion lines in phase volume-temperature space met at a ''critical point'' that coincided with the lower critical end point for the phases.