Binary polymer solution

For a binary polymer solution, the reciprocal of the osmotic compressibility 0n/0c at constant T and the solvent chemical potential p0 can be determined by sedimentation equilibrium through the relation [58,59] ... 

The above molecular thermodynamic model for polymer systems has been widely tested by comparing with simulation results (Yang et al., 2006a Xin et al., 2008a). Figure 8 shows the comparisons between predicted critical temperature and critical volume fraction for binary polymer solutions at different chain lengths of with the... 

Figure 9 Coexistence curve of binary polymer solutions with different chain lengths. From bottom to top the chain lengths are 1, 2, 4, 8,16, 32, 64,100, 200, and 600, respectively.

Figure 10 Coexistence curve of binary polymer solutions with chain length r2 = 18 and 60. Open squares MC data solid line this work dash line Flory-Huggins theory dotted line Freed theory.

Figure 14 Normalized internal energy of mixing for a binary polymer solutions with r2 = 64(Yang et al., 2006a) and 100. MC data kT/(E = 4 (open square) kT/r = 10 (open triangle) kT/

Qian, C. Mumby, S.J. Eichinger, B.E., "Phase Diagrams of Binary Polymer Solutions and Blends," Macromolecules, 24, 1655 (1991). 

VLB including infinite dilution conditions for binary polymer solutions " ... 

A very interesting result is the correlative and predictive performance for the UCST of binary polymer solutions with the van der Waals equation of state. Excellent correlation is achieved and reasonable prediction, using an extremely simple equation developed from athermal polymer-solvent VLE (which is simply a linear correlation of the interaction parameter with the molecular weight of the solvent). Two important comments can be made ... 

Wohlfarth, C., VLE Data of Binary Polymer Solutions, Elsevier, Amsterdam, 1994. 

Upper Critical (UCST) and Lower Critical (LCST) Solution Temperatures of Binary Polymer Solutions... 

VAPOR PRESSURES (SOLVENT ACTIVITIES) FOR BINARY POLYMER SOLUTIONS... 

The vapor pressure of a binary polymer solution is given by the activity of the solvent A, a. Solvent activities in polymer solutions are measured either by the isopiestic method applying a reference system whose solvent activity is precisely known or by determining the solvent partial pressure, Pand calculating the activity of the solvent by equation (1) ... 

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