Critical phenomena in the ultracentrifuge: Some new experimental evidence

Jack Winnick, Charles M. Knobler and Robert L. Scott

Physica A: Statistical Mechanics and its Applications, 1989, vol. 156, issue 1, 77-91

Abstract: In 1954 Hildebrand et al. reported that when a hydrocarbon + fluorocarbon mixture was spun in an ultracentrifuge, its critical solution temperature Tc was raised by an amount appreciably in excess of that attributable to the hydrostatic pressure. Two alternative explanations for this anomaly have been offered: a density inversion leading to turbulence mistaken for phase separation, and a “stretching” of the correlation length by the field gradient. We have made ultracentrifuge studies of three critical mixtures, including a hydrocarbon + fluorocarbon one, and find no anomalous rise in Tc.

Date: 1989
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:156:y:1989:i:1:p:77-91

DOI: 10.1016/0378-4371(89)90110-6

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