Sorption and diffusion measurements in ternary polymer–solvent–solvent systems by means of a magnetic suspension balance—Experimental methods and correlations with a modified Flory–Huggins and free-volume theory

Schabel, Wilhelm; Scharfer, Philip; Kind, Matthias; Mămăligă, Ioan

doi:10.1016/j.ces.2006.12.062

Cited by 51 publications

(38 citation statements)

References 18 publications

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“…and measurement data into accordance . The results were additionally verified by a measurement routine proposed by Schabel to obtain ternary diffusion data with a magnetic suspension balance. However, the data presented is far from exhaustive.…”

Section: Introductionsupporting

confidence: 55%

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Prediction of diffusion in a ternary solvent–solvent–polymer blend by means of binary diffusion data: Comparison of experimental data and simulative results

Siebel

Scharfer

Schabel

2016

J of Applied Polymer Sci

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Multicomponent diffusion of solvents in polymeric systems is not completely understood, despite many scientific contributions to the topic. Literature scarcely offers measurement data on diffusion for model validation in such systems. In this work, the ternary systems consisting of poly(vinyl acetate) and the solvents toluene and methanol was investigated experimentally and numerically. By means of inverse micro Raman spectroscopy (IMRS) concentration gradients in drying thin films have been measured. Initial composition of the samples has been varied systematically in order to detect mutual influence of the solvents' diffusive behavior. It was shown that the mobility of the different species is increased in the presence of other solvents as predicted by theory. This experimental data is provided for model validation. A new expression to calculate the diffusion coefficients in ternary mixtures is proposed which only requires binary data. This expression is tested by means of a model-based simulation to predict the drying of ternary polymer solutions in terms of concentration profiles and residual solvent content. The results are in very good agreement with the experiments. Cross terms diffusion coefficients and thermodynamic factors were not found to be necessary for a satisfying prediction.

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Section: Introductionsupporting

confidence: 55%

“…In this case, after the complete evaporation of methanol, the drying process reduces to a binary problem. This specific situation has been previously under investigation in the work of Schabel (2003) …”

Section: Resultsmentioning

confidence: 87%

Prediction of diffusion in a ternary solvent–solvent–polymer blend by means of binary diffusion data: Comparison of experimental data and simulative results

Siebel

Scharfer

Schabel

2016

J of Applied Polymer Sci

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“…Only few studies [2,10] have been reported in literature in this field. Schabel et al [11] have modified the Flory-Huggins theory and found good agreement with experimental and model predicted diffusion data in case of poly (vinyl acetate)-methanol-toluene system. They have not shown the comparison among the different multicomponent diffusion models.…”

Section: Introductionmentioning

confidence: 69%

Simulation analysis of drying of ternary polymeric solution coatings

Arya

Bhargava

2015

Progress in Organic Coatings

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“…To illustrate the accuracy of the IR method, we have first measured the VLE data for toluene/PVAC and methanol/PVAC systems at 100 • C and compared them with literature data measured by different groups [11,12,[16][17][18][19]. Methanol sorption data have also been collected in our laboratories (at 60 • C) by gravimetric sorp- Fig.…”

Section: Resultsmentioning

confidence: 99%

“…ing [9,10] or a magnetic suspension balance [11] was modified for acquiring sorption data of mixed solvents dissolved in the polymer.…”

Section: Introductionmentioning

confidence: 99%

Measurement of ternary polymer/solvent equilibrium data by vapor-phase infrared spectroscopy

Yürekli

Altınkaya

2009

Fluid Phase Equilibria

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Vapor-liquid equilibrium (VLE) data for binary toluene/PVAC, methanol/PVAC and ternary toluene/methanol/PVAC systems have been measured at 100• C by using vapor-phase infrared spectroscopy. Binary data have been compared with literature data measured by different experimental techniques and agreement between our measurements and others was found to be good. The ternary VLE data indicate that the solubility of methanol in PVAC is not influenced by the presence of toluene, while the solubility of toluene is lowered due to presence of methanol. To predict ternary VLE data, the Entropic free volume and Kannan free volume models and the Flory-Huggins theory were used. The predictive abilities of Flory-Huggins theory and the Kannan free volume model are similar and better than that of the Entropic free volume model.

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Sorption and diffusion measurements in ternary polymer–solvent–solvent systems by means of a magnetic suspension balance—Experimental methods and correlations with a modified Flory–Huggins and free-volume theory

Cited by 51 publications

References 18 publications

Prediction of diffusion in a ternary solvent–solvent–polymer blend by means of binary diffusion data: Comparison of experimental data and simulative results

Prediction of diffusion in a ternary solvent–solvent–polymer blend by means of binary diffusion data: Comparison of experimental data and simulative results

Simulation analysis of drying of ternary polymeric solution coatings

Measurement of ternary polymer/solvent equilibrium data by vapor-phase infrared spectroscopy

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