Phase Behavior for the Poly(phenyl methacrylate) and Phenyl Methacrylate in Supercritical Carbon Dioxide and Dimethyl Ether

Experimental data up to 463.1 K and 269.14 MPa are revealed for binary and ternary mixtures of poly(phenyl methacrylate) [P(PhMA)] + carbon dioxide (CO2) + phenyl methacrylate (PhMA) and P(PhMA) + CO2 + dimethyl ether (DME) systems. The cloud-point pressure for the P(PhMA) + CO2 + PhMA system is measured with the variations of temperature, and PhMA weight fraction of 39.4, 45.8, 54.2, 59.9, and 62.1 wt %. In 62.1 wt % PhMA to the solution of P(PhMA) + carbon dioxide, the cloud-point phase behaviors are shown the typical lower critical solution temperature (LCST). In addition, the effect by cosolvents concentration for the P(PhMA) + CO2 + DME system is investigated at temperature to 453.9 K and pressure range from 52.24 to 80.86 MPa. The cloud point curve for P(PhMA) + CO2 + DME systems is shifted from LCST region to upper critical solution temperature (UCST) region according to the increase of DME concentration. We report experimental data of the PhMA + CO2 system at high pressures range from 6.24 to 24.9...