High-Pressure Phase Behavior of Poly(L-lactic acid), Trichloromethane, and Carbon Dioxide Ternary Mixture Systems
- High-Pressure Phase Behavior of Poly(L-lactic acid), Trichloromethane, and Carbon Dioxide Ternary Mixture Systems
- 임태현; 권정민; 김수현; 신훈용; 김화용
- Issue Date
- Journal of chemical and engineering data
- VOL 60, NO 7, 2172-2177
- In this study, the phase behavior of a poly(L-lactic acid) (M = 312 000, polydispersity 2.189)-trichloromethane-carbon dioxide ternary system was measured using a variable volume view cell at pressures up to 34.0 MPa and temperatures between (313.15 K and 363.15) K at an interval of 10 K. Bubble and cloud point pressures were determined as functions of the trichlomethane-to-carbon dioxide ratio, concentration of poly(L-lactic acid) (1.0, 2.0, and 3.0 wt %), and temperature. The hybrid equation of state for the supercritical CO2-polymer system combined with the van der Waals one-fluid mixing rule was used for correlation of the experimental results. The three binary parameters of this system were optimized by the simplex method algorithm.
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