Abstract
The influence of the distribution of chain length of the ether chain in polyethylene glycol dodecyl ethers and of various additives on the solubilizing capacity of nonionic surfactants was investigated by determination of the regions for isotropic solutions. A suggested theory for microemulsions was found useful for microemulsions at temperatures in excess or below the PIT; at temperatures close to the PIT, when surfactant phases are formed, the structure remains undetermined. Preliminary estimations of the bending energies in surfactant monolayers do not rule out the coexistence of O W and W O dispersions in the surfactant phase. The influence of added substances on the solubilization indicated a connection between the structured part of liquid water and the strongly temperature dependent association structures containing polyoxyethylene alkyl ethers. Contrarily, the solubility of water in the liquid emulsifier varied only to a small extent in the HLB temperature range.
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