Phase separation

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Entry by Emily Redston, AP 225, Fall 2011

Figure 1 (from Haasen)
Figure 2 (from Haasen)

We typically talk about phase separation in terms of the regular solution model of liquids. The free energy of mixing can be written as,

            <math>\frac{G_{mix}}{kT}=Nnv _{A}\ln v _{A}+x _{B}\ln v _{B}+\epsilon v _{A} v _{B}</math>
            where <math>\epsilon = zN[V_{AB} - {1 \over 2}(V_{BB}+V_{BB})]</math> 

V represents bond energies, z is the number of neighbors, N is the total number of atoms, and x is the mole fraction.





See also:

Phase separation in Phases and Phase Diagrams from Lectures for AP225.


References

The Role of Polymer Polydispersity in Phase Separation and Gelation in Colloid−Polymer Mixtures