A Study on the Densities of Polymer Blends and Polymer Solutions at Elevated Pressures

• Main Authors: Lou, Chen-Kou, 羅建國
• Other Authors: Lee Ming-Jer, Lin Ho-mu
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/36651118625363339239

碩士 === 國立台灣工業技術學院 === 化學工程技術研究所 === 85 === PVT data were measured by a high-pressure densimeter in a temperature range of 298.15 K to 338.15 K and pressures up to 30 MPa for several polymer cuts, polymer blends and polymer solutions. The constituent compounds include poly(ethylene glycol)(PEG), poly(ethylene glycol) methyl ether (PEGME) and 1-octanol. The investigated mixtures in this study are PEG-200 + 1-octanol, PEG-600 + 1-octanol, PEGME-350 + 1-octanol, PEG-200 + PEGME-350, PEG-600 + PEGME-350. As shown from the experimental results, the excess volumes of PEG-200 + 1-octanol, PEG-600 + 1-octanol and PEGME-350 + 1-octanol are positive， whereas those of PEG-200 + PEGME-350 and PEG-600 + PEGME-350 are negative.The Tait equation was used to correlate the density data and its coeffi-cients so determined were then applied to calculate the isother-mal compressibilities. The magnitudes of the isothermal compressi-bilities follow the order of 1-octanol > PEGME-350 > PEG-600 > PEG-200. The Redlich-Kister model was used to correlate the excess volumes of the mixtures at each specific temperature and pressure.The Prigogine "square-well" cell model, the FOV model, the Schotte, and the Polymer CPHC equations of state were also employed to correlate the density data. The values of the binary interaction parameters for each binary system were determined simultaneously. The correlated results indicated that the average absolute deviation from the tested models, except for the Prigogine {symbol 147 \f "Times New Roman"}square-well{symbol 148 \f "Times New Roman"} cell model, were acceptable.