Eine verbesserte Apparatur zur Messung von Dampfdrücken über konzentrierten Polymerlösungen und die Anwendung der Meßdaten bei der thermodynamischen Simulation eines Ausdampfextuders

Behme, Stefan; Sadowski, Gabriele; Arlt, Wolfgang

doi:10.1002/cite.330670613

Cited by 8 publications

(2 citation statements)

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“…Parameters necessary to compute the monomer activity in the polymer-particle phase are given in Table . To receive the value of the Flory−Huggins interaction parameter (χ) for the vinyl acetate−polymer (VAc/BuA/AA) system, the VLE measurements were carried out utilizing the absorption apparatus described elsewhere. , The polymer was obtained by careful drying of the latex. The Flory−Huggins interaction parameter was considered composition independent, and its value was obtained by adjusting to the pressure−composition data in the VAc−polymer system.…”

Section: Resultsmentioning

confidence: 99%

Partition Coefficients in Latex Systems: Experimental Determination and Modeling

2003

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A differential pressure technique was developed to specify the monomer partitioning coefficients in latex systems at monomer concentrations up to saturation. Differential pressures were measured on addition of the monomer either to water or to latex. Distribution of monomers between the polymer-particles and aqueous phase was determined using both experimental data sets. Partition coefficients of vinyl acetate and butyl acrylate in the latexes based mainly on the corresponding monomers were evaluated at 65 °C. The data were correlated by a new model considering the thermodynamic equilibrium between two liquid phases of the latex system. Monomer activity in the polymer-particle phase is calculated in the frame of the Flory−Huggins theory, the interfacial contribution being taken into account in terms of the Gibbs−Thomson model. The monomer activity in the aqueous phase is correlated by the NRTL equation. Model parameters were determined independently from the pressure−concentration data for the monomer−water and monomer−polymer binaries.

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Section: Resultsmentioning

confidence: 99%

Partition Coefficients in Latex Systems: Experimental Determination and Modeling

2003

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“…Commonly, sorption balances [4][5][6] are believed to give accurate results: a polymer sample attached to a spring or a magnetically coupled micro balance hangs in a solvent atmosphere and the increasing sample mass after increasing the system pressure gives the solvent uptake of the polymer after correcting for buoyancy. From these data, phase equilibria and diffusion coefficients are calculated.…”

Section: A Pressure Decay Methods For Determination Of Vle and Diffusionmentioning

confidence: 99%

Provision of thermodynamic properties of polymer systems for industrial applications

Pfohl¹,

Dohrn²

2004

Fluid Phase Equilibria

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Vapor-liquid equilibrium data of polycarbonate-bisphenol-A in chlorobenzene

Wohlfarth

2009

Polymer Solutions

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Eine verbesserte Apparatur zur Messung von Dampfdrücken über konzentrierten Polymerlösungen und die Anwendung der Meßdaten bei der thermodynamischen Simulation eines Ausdampfextuders

Cited by 8 publications

References 3 publications

Partition Coefficients in Latex Systems: Experimental Determination and Modeling

Partition Coefficients in Latex Systems: Experimental Determination and Modeling

Provision of thermodynamic properties of polymer systems for industrial applications

Vapor-liquid equilibrium data of polycarbonate-bisphenol-A in chlorobenzene

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