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

Abstract

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 (CO 2 ) + phenyl methacrylate (PhMA) and P(PhMA) + CO 2 + dimethyl ether (DME) systems. The cloud-point pressure for the P(PhMA) + CO 2 + 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) + CO 2 + 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) + CO 2 + 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 + CO 2 system at high pressures range from 6.24 to 24.90 MPa and at several temperatures, that is, 313.2, 333.2, 353.2, 373.2, and 393.2 K. The experimental results are correlated by the Peng−Robinson model with the van der Waals one-fluid mixing rule. Overall, group contributions methods estimate the critical properties for used chemicals in this study.

Binary Solution Behavior for the Trimethoxyphenylsilane and Trimethylphenylsilane Under CO2 as Supercritical Fluid

“…The presence of a minor vapor bubble within the view cell indicates the bubble point pressure. Likewise, the recognition of a fine mist within the cell signifies the dew point pressure. − (4) Critical Point Determination : The critical point (CritP) of the mixture is ascertained upon the observation of opalescence, indicating the emergence of a phase where the vapor and liquid volumes become equal during adjustments to temperature and pressure. − For a more comprehensive understanding, the system’s temperature is increased, and the entire procedure is replicated.…”

Bubble and dew-point measurement of mixtures of 1H,1H,2H-perfluoro-1-octene and 1H,1H,2H,2H-perfluoro-1-octanol in supercritical CO2

“…The critical point (CP) is determined when iridescence is noted together with equivalent vapor and liquid levels upon the development of another phase as we alter the operating pressure and temperature in the mixture. [34][35][36] To attain more data, the system temperature is modified and then the entire operating process is repeated.…”

Co-solvent concentration impact on the cloud point behavior of 2- and 3-ingredient systems of the poly(tridecyl methacrylate) in supercritical CO2

“…Moreover, the mixture critical point is noted with the formation of opalescence with a similar gas and liquid phase volume as one adjusts mixture pressure and temperature. 27,28 Cloud point experimental data were obtained for both binary as well as ternary mixtures at the concentration range of (i.e., 3.0-5.0 wt% [P(TDMA)]), which is usually used in the mixture of polymers with CO 2 in the supercritical phase. The polymer was loaded in the view cell with the standard uncertainty of 0.0008.…”