eng Ansari Education and Research Society Journal of Ultra Scientist of Physical Sciences April 2010 22 1 113 120 juc 906 article Anil Kumar 1 Raja Ram Rai, 1 Richa Sharma 1 Kaushalendra Kumar 1 Birendra Kumar Singh 1 P.G. Department of Chemistry, College of Commerce Patna (INDIA) <p style="text-align: justify;">Phase behavior and structures of one-phase microemulsions of Triton X -100+1-penanol (1:5 molar ratios)/ cyclohexane/ brine have been studied by a combination of techniques such as crossed polaroid microscope, conductivity, viscosity and quasi-elastic light scattering (QELS). Two distinct isotropic one-phase microemulsion regions have been observed in the pseudo-ternary phase diagram. One isotropic single-phase microemulsion region exists in the water corner and the other one appears in the upper portion of the phase diagram which touches oil and surfactant vertexes. Electrical conductivities, viscosity and QELS measurements have been performed to locate the sub-regions in the single-phase microemulsion region. These measurements reveal that structural changes from water-in-oil microemulsion via bicontinuous structure to an oil-in-water microemulsion occurs with increase in weight fraction of water, f_w. The sizes of the microemulsion droplets was determined by QELS and were found in the range of 14-31 nm in the middle of the phase diagram. In the upper portion (at f_s&gt; 60) of the phase diagram, the structure of microemulsion droplets is unclear.<br /> &nbsp;</p> https://ultraphysicalsciences.org/paper/906/ Surfactant microemulsion micelles phase behavior phase diagram