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  • 1
    Electronic Resource
    Electronic Resource
    A comparative study between cosolvent and cononsolvent ternary polymer systems through the preferential adsorption coefficient (1993)
    Springer
    Colloid & polymer science 271 (1993), S. 30-37 
    Details
    ISSN: 1435-1536
    Keywords: Ternary polymeric systems ; preferential adsorption coefficient ; cosolvent ; cononsolvent ; ternary interactions ; excess free energy ; intensity light scattering
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Sorption equilibrium of polystyrene and poly (dimethyl siloxane) in mixed solvents has been monitored by means of the preferential adsorption coefficient experimentally determined from intensity light scattering measurements. The pairs of solvents used to dissolve each polymer sample have been selected for the purpose to perform cosolvent and cononsolvent ternary polymer systems. Flory-Huggins formalism including ternary interactions has been used to predict the sorption equilibrium for the cosolvent system and, for the first time, for cononsolvent ones. Moreover, the proportionality between binary and ternary interactions, recognized by Pouchly, is also corroborated for both ternary polymer systems. From a thermodynamic standpoint, the sorption equilibrium has been described by approaching the behavior of the “bulk solvent” to the binary liquid mixture through the excess Gibbs free energy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00652300
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Prediction of maxima and minima in the curve of total sorption parameter in ternary polymer systems. Influence of ternary interaction parameter (1993)
    Springer
    Colloid & polymer science 271 (1993), S. 372-379 
    Details
    ISSN: 1435-1536
    Keywords: Ternary polymer systems ; extrema thermodynamic behavior ; total sorption parameter ; Flory-Huggins theory
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Flory-Huggins theory modified by Pouchly has been applied to predict maxima and minima in the curve of total sorption in ternary polymer systems formed by a polymer and two liquids. In this work, different diagrams based on experimental magnitudes easily obtained such as the difference in affinities of liquids, solvents and non solvents, and the solvent molar volume ratio. Total sorption parameter has been considered to be the decisive magnitude to define extrema conditions in both cosolvent and cononsolvent ternary polymer systems. The theoretical prediction is not altered by the inclusion of ternary interactions. Different examples of ternary systems dealing with vinyl polymers and polydimethyl siloxane have been used to test the above formalism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00657418
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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