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A continuous dilution method for phase diagram determination

✍ Scribed by H. Hartounian; J. A. Koetitz; E. W. Kaler; S. I. Sandler

Publisher
American Institute of Chemical Engineers
Year
1994
Tongue
English
Weight
520 KB
Volume
40
Category
Article
ISSN
0001-1541

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✦ Synopsis

A relatively simple continuous dilution method with on-line spectrophotometric measurement has been used to determine the phase transition boundaries of aqueous two-phase polymer systems. The observed range of compositions over which the phase transition occurs is dominated by the polydispersity of the polymers, but also is a function of the dilution path followed. The binodal curve obtained by the continuous dilution method agrees well with the results obtained by the traditional method of phase equilibration, separation and analysis of liquid chromatography, which is slower and requires more expensive equipment.

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