研究目的
To measure the phase behavior of a carbon dioxide (CO2)/toluene (Tol)/polystyrene (PS) ternary system and understand the effects of molecular weight of PS, ratio of PS to Tol, and temperature on the phase behavior.
研究成果
The homogeneous phase area decreased with an increase in the molecular weight of PS and/or the ratio of PS to Tol. The phase behavior of ternary systems was significantly affected by changes in mutual solubility between the components. The study provides important insights into the phase behaviors of CO2/organic solvent/polymer systems.
研究不足
The method is affected by the operator's subjectivity in determining cloud points by visual observation. The study also lacks sufficient data to calculate the total uncertainties of bubble points, cloud points, and primary cloud points.
1：Experimental Design and Method Selection:
The phase behavior was measured using a synthetic method combined with reflected light intensity measurement. Bubble points were determined by visual observation, and cloud points were determined from the change in reflected light intensity.
2：Sample Selection and Data Sources:
The system consisted of CO2, toluene, and polystyrene with different molecular weights. The phase boundaries were measured at temperatures ranging from 313.2 K to 373.2 K and CO2 weight fractions ranging from 0.10 to 0.
3：2 K to 2 K and CO2 weight fractions ranging from 10 to List of Experimental Equipment and Materials:
41.
3. List of Experimental Equipment and Materials: A laser light source, light sensors, a data logger, and a high-pressure view cell were used. Materials included CO2, toluene, and polystyrene.
4：Experimental Procedures and Operational Workflow:
The mixture in the cell was observed through a visible window with changing pressure and temperature. The reflected light intensity and pressure were recorded simultaneously.
5：Data Analysis Methods:
The cloud points were obtained by evaluating the change in the reflected light intensity. The pressure difference between the primary cloud point and cloud point was analyzed.
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