Abstract
Vapour–liquid equilibria (VLE) were determined in the poly(methyl methacrylate) + 2-butanone system under isothermal conditions at 333.15, 343.15, and 353.15 K using an improved all-glass microebulliometer with circulation of the liquid phase for the dynamic measurement of total pressure over liquid mixtures. The experimental data were correlated using the UNIQUAC model. The Entropic-FV and the GC-Flory equation of state models were applied to predict VLE, and the results were compared with the experimental data. Both predictive models proved of the same quality and capable of predicting VLE for the studied system.
Highlights
Many industrial processes face a variety of issues related to the thermodynamics of polymer solutions
The aim of this study was to provide new – and always welcome – experimental data on vapour-liquid equilibria (VLE) in the poly(methyl methacrylate) [PMMA] + 2-butanone system, determined under isothermal conditions at 333.15, 343.15, and 353.15 K using techniques infrequently exploited for the investigation of polymer solutions
The PMMA + 2-butanone system was studied at three isotherms: 333.15, 343.15, and 353.15 K
Summary
Many industrial processes face a variety of issues related to the thermodynamics of polymer solutions. To evaluate the thermodynamic properties of industrial systems we need experimental data, which are often missing. We can resort to models based on the structure–property relationship to estimate and/or predict the thermodynamic properties, or phase equilibria in particular. The aim of this study was to provide new – and always welcome – experimental data on vapour-liquid equilibria (VLE) in the poly(methyl methacrylate) [PMMA] + 2-butanone (methyl ethyl ketone) system, determined under isothermal conditions at 333.15, 343.15, and 353.15 K using techniques infrequently exploited for the investigation of polymer solutions. Three group contribution prediction models developed earlier were tested against the obtained experimental data to see how applicable they may be for practical use. It was concluded that the accuracy given in 4 digits in composition was reliable
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