Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

ABSTRACT

The solid-liquid equilibrium (SLE), excess molar volume and refractivity deviation values were reported for binary systems consisting of dimethyl carbonate (DMC), anisole and phenol, all three of which are reaction intermediates in the synthesis of polycarbonate (PC). The SLE plots for the binary systems {DMC + anisole}, {DMC + phenol}, {anisole + phenol} at atmospheric pressure displayed a single eutectic point and correlated well with the values calculated using the non-random two-liquid (NRTL) and universal quasi-chemical (UNIQUAC) equations. The excess molar volume (VE) and the deviation in the molar refractivity (delta-R) were calculated using density and refractivity data measured at 323.15K. The calculated VE and delta-R data deviated from ideal behavior in either a negative or a positive direction, depending on the particular binary system. The experimental data correlated well with the curves calculated using the Redlich-Kister equation. In addition, the ternary VE and delta-R data were calculated for the {DMC+ anisole+ phenol} system at 323.15K by using the correlated Redlich-Kister parameters of the respective binary constituents.