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

Cloud point data of the 2- and 3-ingredient poly (tridecyl methacrylate) [P(TDMA)] mixture in supercritical CO2 and dimethyl ether (DME) have been obtained experimentally with the help of variable volume-view cell at a high pressure. The phase behavior for the considered systems is observed in a temperature range from (306 to 474) K and pressure of p < 262 MPa. P(TDMA) + supercritical CO2 + tridecyl methacrylate (TDMA) mixture cloud point data are measured by varying the concentrations of co-solvent (5.3 to 35.7) wt%, pressure, and temperature. In addition, the experimental cloud point data of P(TDMA) + CO2 + DME and P(TDMA) + DME systems are reported with temperature and pressure in the range of (314.4 ≤ T ≤ 464.5) K and (1.59 ≤ p ≤ 248.45) MPa, respectively. The phase behavior experimentally measured data for TDMA is acquired in supercritical carbon dioxide for a temperature range of (313.2 ≤ T ≤ 393.2) K and a series of pressures (4.52 ≤ p ≤ 25.59) MPa. The theoretical investigation is conducted using the Peng-Robinson equation of state with van der Waals single fluid mixing rules having a couple of interaction factors.