TY - JOUR
T1 - Thermodynamics of ternary mixtures exhibiting tunnel phase behaviour. Part 1. - Cyclohexane-perdeuterocyclohexane-perfluorohexane
AU - Batchelor, H.K.
AU - Clements, P.J.
AU - McLure, I.A.
PY - 1996/6/21
Y1 - 1996/6/21
N2 - The liquid-liquid phase separation temperatures T for the binary mixtures cyclohexane or perdeuterocyclohexane-perfluorohexane and for the ternary mixture (equivolume cyclohexane-perdeuterocyclohexane)-perfluorohexane have been determined by visual observation. Perdeuteriation of cyclohexane lowers the upper critical solution temperature T from 346.16 to 337.69 K but the shape of the phase diagram in terms of the Wegner extended scaling series is unaltered. In contrast, although the maximum separation temperature of the ternary mixture T is little different from T of cyclohexane-perfluorohexane, the shape of the T vs. perfluorohexane mole fraction curve is substantially different. The results cast some doubt on the assumption that the thermodynamics of a solution, and hence the surface structure, in a contrast-matched solvent in reflectivity measurement is the same as would be obtained in the pure solvent.
AB - The liquid-liquid phase separation temperatures T for the binary mixtures cyclohexane or perdeuterocyclohexane-perfluorohexane and for the ternary mixture (equivolume cyclohexane-perdeuterocyclohexane)-perfluorohexane have been determined by visual observation. Perdeuteriation of cyclohexane lowers the upper critical solution temperature T from 346.16 to 337.69 K but the shape of the phase diagram in terms of the Wegner extended scaling series is unaltered. In contrast, although the maximum separation temperature of the ternary mixture T is little different from T of cyclohexane-perfluorohexane, the shape of the T vs. perfluorohexane mole fraction curve is substantially different. The results cast some doubt on the assumption that the thermodynamics of a solution, and hence the surface structure, in a contrast-matched solvent in reflectivity measurement is the same as would be obtained in the pure solvent.
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-33748584598&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:33748584598
SN - 0956-5000
VL - 92
SP - 2255
EP - 2262
JO - Chemical Society. Faraday Transactions. Journal
JF - Chemical Society. Faraday Transactions. Journal
IS - 12
ER -