CO2在PPO和PS共混物中的溶解与扩散行为研究

以超临界CO₂为发泡剂，采用质量衰减法测试发泡剂在聚苯醚（PPO）/聚苯乙烯（PS）中的溶解扩散性，在静态条件下系统研究了工艺参数及PPO/PS组成对CO₂溶解度与扩散系数的影响，建立了温度、压力及PPO含量与CO₂溶解度的定量关系。结果表明，CO₂在PPO/PS中的溶解度随着PPO含量的增加而增加，随着压力的增加和温度的降低而增大；扩散系数随着PPO含量的增加而减小，随着温度的升高和饱和压力的增大而增大。

Solubility and diffusion behavior sof CO2 in PPO and PS blends

In this paper， supercritical CO₂ was used as a foaming agent to investigate its dissolution and diffusivity in PPO/PS blends through a weight decay method. The effects of process parameter and PPO/PS composition on the solubility and diffusion coefficient of CO₂ were systematically studied under static conditions. The quantitative relationship between the temperature， pressure， and PPO content and the CO₂ solubility was established. The results indicated that the solubility of CO₂ in PPO/PS blends increased with an increase in the PPO content and pressure but a decrease in temperature. The diffusion coefficient decreased with an increase in the PPO content but increased with an increase in temperature and saturation pressure.