Herein, the influence of HV (hydroxyvalerate) addition (8.0 and 8.7 wt% HV) on the PHBV (poly(3-hydroxybutyrate-co-3-hydroxyvalerate)) composition from the perspective of phase equilibrium in high-pressure {(CO₂ (1) + chloroform (2) + [PHBV - 8.0 wt%] (3) and (CO₂ (1) + chloroform (2) + [PHBV - 8.7 wt%] (3)} systems was examined using the static synthetic method with a visual variable-volume view cell at temperatures ranging from 303.15 to 333.15 K, pressures approximately 10 MPa, and different concentrations of PHBV (HV = 8.0 and 8.7 wt%) in chloroform (0.01 and 0.02 g.cm⁻³). Transitions of the solid-vapor-liquid (SVL) were observed. The experimentally determined phase transitions were successfully modeled using the PC-SAFT equation of state.

在此，从高压{（CO _2）的相平衡的观点出发，添加HV（羟基戊酸酯）（8.0和8.7wt％HV）对PHBV（聚（3-羟基丁酸酯-co-3-羟基戊酸酯））组成的影响。（1）+氯仿（2）+ [PHBV-8.0 wt％]（3）和（CO ₂（1）+氯仿（2）+ [PHBV-8.7 wt％]（3）}系统使用静态合成方法进行了研究在303.15至333.15 K的温度范围内，压力约为10 MPa以及氯仿中浓度不同的PHBV（HV = 8.0和8.7 wt％）（0.01和0.02 g.cm ^-3）的情况下，采用可视可变体积视图单元的方法。观察到了固-气-液（SVL）的转变，使用PC-SAFT状态方程成功地模拟了实验确定的相变。