Solubility of Poly(vinylpyrrolidone) with Different Molecular Weights in Supercritical Carbon Dioxide

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• 作者：Jun-su Jin ; Cheng-wei Chang ; Jing Zhu ; Hao Wu ; Ze-ting Zhang
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2015
• 出版时间：November 12, 2015
• 年：2015
• 卷：60
• 期：11
• 页码：3397-3403
• 全文大小：327K
• ISSN：1520-5134

文摘

For studying the phase behavior of poly(vinylpyrrolidone) (PVP) with different molecular weights in supercritical carbon dioxide (SCCO₂), the equilibrium solubilities of PVP with different molecular weights of 10000, 24000, and 58000, which were widely used as polymeric carriers in supercritical fluid impregnation technology, were measured in SCCO₂ at temperatures of (313, 323, 333, and 343) K and in the pressure range of (9.0 to 18.0) MPa by the dynamic method. The effects of pressure, temperature, and molecular weight of solute on PVP solubility were investigated by comparing the solubility data in SCCO₂, and it was found that the solubility of PVP in SCCO₂ increased with pressure and temperature increasing for the same solute molecular weight and with the solute molecular weight decreasing at the same operational conditions. The solubility data of PVP in SCCO₂ were correlated by five density-based semiempirical models (Chrastil, M-S-T, K-J, S-S, A-L), and satisfactory correlation results were achieved between the experimental and calculated data.