Work

Cloud-point curves of polymer solutions from thermooptical measurements

Year: 1991

Type: article

Abstract: Thermo-Optical Analysis (TOA) provides a simple, rapid and reliable experimental method to determine cloud-point curves of binary polymersolvent systems.Phase diagrams have been obtained for different molecular weights of polystyrene in cyclohexane, methyl acetate, ethyl acetate, and tbutyl acetate; and for poly(ethylene glycol) in water.Polystyrene solutions exhibit both upper and lower critical solution temperatures, while aqueous poly(ethylene glycol) solutions give closed-loop phase diagrams.The TOA apparatus described here uses very small samples (0.02 cm 3 ); for a binary system, upper and lower cloud-point curves can easily be obtained in about 8 hours.

Source: Macromolecules

DOI: 10.1021/ma00015a024

Authors: Y. C. Bae, S. M. Lambert, D. S. Soane, J. M. Prausnitz

Institution: University of California, Berkeley

Language: English

Topic: Phase Equilibria and Thermodynamics

Subfield: Physical and Theoretical Chemistry

Field: Chemistry

Domain: Physical Sciences

Open Access status: green

Funders: U.S. Department of Energy, Basic Energy Sciences

Awards: G1398330795, G1643223109, G193590374, G301008592, G3444594369