Cloud-point measurement of binary and ternary mixtures for the P(MMA-co-PnFPA) in supercritical fluoric solvents

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

“…3. The phase behavior diagram of this solution is the (UCST) region, i.e., upper critical solution temperature 28,31 with a negative slope for the (459 o T o 474) K range. The cloud point measurement of three ingredient systems CO 2 + 4.8 wt% P(TDMA) + 15.1 wt% TDMA is performed in the temperature range of (409.7 o T o 452.7) K. The weak interactions between either polymer + polymer or (co)-solvent + (co)-solvent controls the internal energy and leads to a distinct phase separation in the mixture.…”

“…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.…”

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

“…The high pressure equilibrium cell with the static type of variable-volume view cell is used to determine the cloud-point pressure and bubble point. Details of the process are described in previous reports. − The high-pressure measurement system is used to obtain cloud-point pressure curves for P­(PhMA) + CO 2 + PhMA, P­(PhMA) + CO 2 + DME, , and CO 2 + PhMA systems. , …”

“…Details of the process are described in previous reports. 18−21 The high-pressure measurement system is used to obtain cloud-point pressure curves for P(PhMA) + CO 2 + PhMA, P(PhMA) + CO 2 + DME, 18,19 and CO 2 + PhMA systems. 20,21 Initially, a certain amount of polymer was loaded into the equilibrium cell with the standard uncertainty of 0.002 g. Afterward, the cell was purged with nitrogen and supercritical fluid solvents to make all of the organic compounds remove.…”

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.…”