Professor Sivaramakrishna Chandrasekhar,FRS |
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| Authors: | Professor George W Gray |
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| Institution: | 1. Department of Physics , Kenyon College , Gambier, Ohio, 43022, U.S.A.;2. Department of Physics , Kenyon College , Gambier, Ohio, 43022, U.S.A.;3. Department of Physics and Astronomy , Swarthmore College , Swarthmore, Pennsylvania, 19081, U.S.A. |
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| Abstract: | Abstract Optical microscopy in mixtures of di-octylazoxybenzene (8AB) and di-nonylazoxybenzene (9AB) reveals that a smectic A-nematic-isotropic triple point occurs at 71·5±0·5°C and 38±2wt% 8AB. Although this concentration induced triple point is different from the pressure induced triple point known to exist in pure 9AB at elevated pressure, analysis of the data from both the mixing and pressure experiments reveals that the phase transition surfaces in temperature-pressure-concentration space for this system are nearly planar. |
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