| 초록 |
The phase behavior data were reported for poly(2-phenoxyethyl acrylate) [P(2-POEA)] in supercritical CO2 and dimethyl ether (DME), as well as for the P(2-POEA) + 2-2-phenoxyethyl acrylate (2-POEA) (or DME) in CO2. The cloud-point data are measured for the P(2-POEA) + DME in supercritical CO2 at temperature range of (329 ~ 443) K and a pressure range of (48.97 ~ 208.22) MPa. The P(2-POEA) in supercritical CO2 is not soluble to the temperature of 473 K and pressure of 220 MPa. The phase behavior for the P(2-POEA) + CO2 + 2-POEA mixture were measured in changes of the pressure–temperature (p, T) slope and with 2-POEA mass fraction of 27.4 wt%, 35.7 wt%, 45.8 wt% and 50.7 wt%. With 55.7 wt% 2-POEA to the P(2-POEA) + CO2 solution, the cloud-point curves take on the appearance of a typical lower critical solution temperature boundary, liquid + liquid transition and liquid + vapor transition. The location of the P(2-POEA) + CO2 cloud-point curve shifts to lower temperatures and pressures upon the addition of 2-POEA or DME. |
