High pressures phase behavior data for the CO₂/tetrahydrofurfuryl methacrylate (THFMA) systems are presented at (313.2–393.2) K and up to 22.07 MPa. The system exhibits the Type-I phase behavior with a continuous mixture-critical curve. The solubilities of poly(tetrahydrofurfuryl methacrylate) [P(THFMA)] + THFMA or dimethyl ether (DME) in supercritical carbon dioxide (CO₂) were measured up to 490.5 K and 289.83 MPa. The cloud-point pressure for the P(THFMA) + CO₂ system shifts to lower pressures as adding THFMA and DME as a cosolvent. P(THFMA) in pure CO₂ did not dissolve up to the temperature of 498 K and pressure of 300.0 MPa. All experimental results with vapor-liquid equilibrium (VLE) for the CO₂/THFMA binary system and the cloud-point phase behaviors for the P(THFMA)/CO₂/cosolvent ternary systems were adequately modeled by the PC-SAFT equation of state. Calculation of the results with the PC-SAFT model showed that the UCST-type phase behavior is mainly due to governed by the interaction between the same species (i.e., between THFMA and THFMA, and between CO₂ and CO₂), rather than that between different species (i.e., between THFMA and CO₂).

给出了CO ₂ /甲基丙烯酸四氢糠基酯（THFMA）系统的高压相行为数据（313.2–393.2）K，最高22.07 MPa。该系统表现出具有连续的混合临界曲线的I型相态。测量了聚甲基丙烯酸四氢糠酯[P（THFMA）] + THFMA或二甲醚（DME）在超临界二氧化碳（CO ₂）中的溶解度，最高至490.5 K和289.83 MPa。当添加THFMA和DME作为助溶剂时，P（THFMA）+ CO ₂系统的浊点压力变为更低的压力。在纯CO _2中的P（THFMA）最高至498 K的温度和300.0 MPa的压力都不会溶解。所有具有CO ₂气液平衡（VLE）的实验结果通过PC-SAFT状态方程对/ THFMA二元体系和P（THFMA）/ CO ₂ /助溶剂三元体系的浊点相行为进行了充分建模。用PC-SAFT模型计算结果表明，UCST型相行为主要是由相同物质之间的相互作用（即THFMA和THFMA之间以及CO ₂和CO _2之间）相互作用所决定的，而不是在不同物种之间（即，在THFMA和CO ₂之间）。