Effect of Pressure on the Melting Point of Pluronics in Pressurized Carbon Dioxide

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• 作者：Ruchir Bhomia ; Vivek Trivedi ; John C. Mitchell ; Nichola J. Coleman ; Martin J. Snowden
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：July 2, 2014
• 年：2014
• 卷：53
• 期：26
• 页码：10820-10825
• 全文大小：352K
• ISSN：1520-5045

文摘

The melting points of Pluronic F-77, F-127, F-68, F-38, and F-108 were investigated in pressurized CO₂ between a pressure range of 2.0鈥?0.0 MPa. Unprocessed and CO₂-processed Pluronic samples were analyzed by differential scanning calorimetry (DSC) and powder X-ray diffraction (PXRD). A melting point depression in the range of 18.1 (卤 0.5 K) to 19.3 (卤 0.3 K) was observed for all Pluronics studied in this work. The melting point of Pluronics in pressurized CO₂ was found to be independent of their molecular weight and poly(propylene oxide) [PPO] content. Analysis by DSC and PXRD revealed that CO₂ processing had no impact on the morphology of Pluronics.