PMID: 11308543Apr 20, 2001Paper

Coexistence curve exponent of a binary mixture with a high molecular weight polymer

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
K To

Abstract

We studied the effects of a high molecular weight polymer (polyacrylic acid, PAA, M(w)=7.5 x 10(5)) on the coexistence curve of a binary liquid mixture (2,6-lutidine + water, LW). A high precision refractometer was built to measure the temperature dependence of the refractive indexes of the two coexisting phases of phase separated LW samples containing less than 1 mg/cc of PAA. From the refractive indexes we mapped out the coexistence curve and obtained the refractive index difference triangle upn between the two coexisting phases. At temperature T close to the critical temperature T(c), the critical exponent beta such that triangle n inversely proportional to (T-T(c))(beta) was found to be 0.41+/-0.02 which is higher than (0.31+/-0.01) that of pure LW.

References

May 25, 1992·Physical Review Letters·B ChuM Okada

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Citations

Jul 30, 2005·The Journal of Chemical Physics·Pannur Venkatesu
Sep 21, 2011·The Journal of Physical Chemistry. B·P Madhusudhana ReddyH B Bohidar
Sep 1, 2006·The Journal of Physical Chemistry. B·Pannur Venkatesu
Nov 3, 2006·The Journal of Physical Chemistry. B·Patricia CastellanosSandra C Greer

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