PHASE EQUILIBRIA OF TETRAMETHYLDIOCTYL-DISILOXANE,WATER AND ORGANIC SOLVENTS |
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Authors: | Daniel M. Heenan Stig E. Friberg Johan Sjöblom |
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Affiliation: | 1. Center for Advanced Materials Processing, Clarkson University , Potsdam, New York, 13699-5814;2. Department of Chemistry , University of Bergen , Bergen, N-5007, Norway |
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Abstract: | The phase diagrams for tetramethyldioctyldisiloxane (TDDS), water and several organic components were determined using refractive index, polarizing microscopy and low angle x-ray diffraction. The solubility limits of the alcohols were established by quantitative analysis and compared to the refractive index of known single phase mixtures. The non-ionic surfactants systems contained isotropic liquids of varying concentrations. Two lyotropic liquid crystal regions were discovered, one of lamellar structure and one consisting of a hexagonal array of closed packed cylinders. The character of the amphiphiles components to solubilize the TDDS is reflected in Ihe phase equilibria. |
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