| 초록 |
Experimental data to 235℃ and 3,000 bar are measured for binary and ternary mixtures of poly(n, iso, tert-butyl methacrylate)-CO2-n, iso, tert-butyl methacrylate and poly(n, iso, ter-butyl acrylate)-supercritical solvents-n, iso, tert-butyl acrylate systems. Also, Pressure-composition isotherms are obtained for the CO2-iso-butyl acrylate and CO2-iso-butyl methacrylate systems at 40-120℃ and pressure up to 160 bar. The experimental results for CO2-iso-butyl acrylate and CO2-iso-butyl methacrylate systems are modeled using Peng-Robinson equation of state. The phase behavior of the poly(n, iso, tert-butyl methacrylate)-CO2 system presents a negative slope with dissolve at temperature of 235℃ and pressure of 2,600 bar. The cloud-point curve for poly(n, iso, tert-butyl acrylate)-CO2 mixture exhibits upper critical solution temperature(UCST) region phase behavior with a negative slope. The phase behavior for poly(n, iso, tert-butyl methacrylate)-CO2 mixture shows smooth UCST type. |
