Phase behavior of hyperbranched polymer solutions in mixed solvents

T. Zeiner, S. Enders

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

Abstract

Hyperbranched polymers get more and more interesting for several applications due to their tailor-made properties influenced by the architecture and the functional groups of the polymer. The liquid-liquid phase behavior of hyperbranched polymer solutions is an important issue for various applications. Until now, the calculations of these phase equilibria are limited to solutions of hyperbranched polymers in a single solvent using Lattice Cluster theory (LCT). The LCT permits the incorporation of the architecture of the polymer directly in thermodynamic properties, as the Helmholtz energy, without any additional adjustable parameter.This papers aims at the extension of the LCT to ternary systems made from hyperbranched polymer (Boltorn H20), water and propanol. The derived expression for the Helmholtz energy allows for the first time the prediction of miscibility gaps in the ternary system based on experimental data of the binary subsystems.Additionally to the architecture of hyperbranched polymers also the functional groups of hyperbranched polymers play an important role in phase equilibrium. In order to include the association phenomena in the theoretical framework, a modified version of the Wertheim association theory is used. However, during the application of this approach the model lost its predictive power, because ternary data must be used for the parameter estimation procedure. Nevertheless, the combined theory is able to model the experimental phase behavior within the experimental accuracy.

Originalspracheenglisch
Seiten (von - bis)5244-5252
Seitenumfang9
FachzeitschriftChemical Engineering Science
Jahrgang66
Ausgabenummer21
DOIs
PublikationsstatusVeröffentlicht - 1 Nov 2011

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Polymer Solution
Phase behavior
Polymer solutions
Polymers
Ternary
Phase Equilibria
Hermann Von Helmholtz
Ternary systems
Phase equilibria
Functional groups
Association reactions
Liquid
1-Propanol
Thermodynamic Properties
Liquids
Propanol
Energy
Parameter estimation
Parameter Estimation
Subsystem

Schlagwörter

    ASJC Scopus subject areas

    • !!Chemical Engineering(all)
    • !!Chemistry(all)
    • !!Industrial and Manufacturing Engineering
    • Angewandte Mathematik

    Dies zitieren

    Phase behavior of hyperbranched polymer solutions in mixed solvents. / Zeiner, T.; Enders, S.

    in: Chemical Engineering Science, Jahrgang 66, Nr. 21, 01.11.2011, S. 5244-5252.

    Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

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