High pressures phase equilibrium data were presented for the CO2+2-MEA system at temperatures ranging from (313.2 to 393.2) K and pressures up to ca. 17.97MPa. The CO2+2-MEA system exhibited type-I phase behavior and was modeled using the Peng-Robinson equation of state. The phase behavior data were reported for poly(2-methoxyethyl acrylate) [P(2-MEA)] in supercritical CO2 and dimethyl ether (DME), as well as for the P(2-MEA)+2-methoxyethyl acrylate (2-MEA) (or DME) in CO2. The cloud-point data were measured for the P(2-MEA)+DME in supercritical CO2 at temperature range of (333-453) K and a pressure range of (8.79-199.14) MPa. The P(2-MEA) in supercritical CO2 was soluble to 453 K and pressure of 199MPa. The phase behavior for the P(2-MEA)+CO2+2-MEA mixture was measured in changes of the pressure-temperature (p, T) slope and with 2-MEA mass fraction of 0.0 wt%, 8.4 wt%, 17.1 wt%, 45.4 wt% and 65.0wt%. With 74.5 wt% 2-MEA to the P(2-MEA)+CO2 solution, the cloud-point
curves took on the appearance of a typical lower critical solution temperature boundary, liquid+liquid transition and liquid+vapor transition. The location of the P(2-MEA)+CO2 cloud-point curve shifted to lower temperatures and pressures upon the addition of 2-MEA or DME.
Kikic I, Vecchione F, Curr. Opin. Solid State Mater. Sci., 7, 399, 2003
Kazarian SG, Supercritical fluid technology for drug product development, chapter Supercritical Fluid Impregnation of Polymers for Drug Delivery, Marcel-Dekker, 343, 2004
Mueller XM, Jegger D, Augstburger M, Horisberger J, von Segesser LK, Int. J. Artif. organs, 25, 223, 2002
Tanaka M, Motomura K, Ishii N, Shimura K, Onishi M, Mochizuki A, Hatakeyama T, Polym. Int., 49, 1709, 2000
Tanaka M, Mochizuki A, Shiroya T, Motomura K, Shimura M, Onishi M, Okahaba Y, Colloids Surf., A, 203, 195, 2002
Tanaka M, Mochizuki A, Motomura K, Shimura M, Onishi M, Okahata Y, Colloids Surf., A, 193, 145, 2001
Tanaka M, Bio-Med. Mater. Eng., 14, 427, 2004
Tanaka M, Mochizuki A, J. Biomed. Mater. Res. A, 68, 684, 2003
Tanaka M, Blood compatibility of poly(2-methoxyethyl acrylate): Design of a novel bio-interface, Ph. Dissertation D, Hokkaido University, Sapporo, Hokkaido, 2003