50th Anniversary Perspective: Phase Behavior of Polymer Solutions and Blends
| Autor: | Ksenia Timachova, Nitash P. Balsara, P. Knychała, Michal Banaszak |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
Polymers and Plastics Chemistry Organic Chemistry Thermodynamics 02 engineering and technology Function (mathematics) Polymer Entropy of mixing Neutron scattering Flory–Huggins solution theory 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Expression (mathematics) 0104 chemical sciences Condensed Matter::Soft Condensed Matter Inorganic Chemistry Phase (matter) Materials Chemistry Statistical physics 0210 nano-technology Phase diagram |
| Zdroj: | Macromolecules. 50:3051-3065 |
| ISSN: | 1520-5835 0024-9297 |
| DOI: | 10.1021/acs.macromol.6b02619 |
| Popis: | We summarize our knowledge of the phase behavior of polymer solutions and blends using a unified approach. We begin with a derivation of the Flory–Huggins expression for the Gibbs free energy of mixing two chemically dissimilar polymers. The Gibbs free energy of mixing of polymer solutions is obtained as a special case. These expressions are used to interpret observed phase behavior of polymer solutions and blends. Temperature- and pressure-dependent phase diagrams are used to determine the Flory–Huggins interaction parameter, χ. We also discuss an alternative approach for measuring χ due to de Gennes, who showed that neutron scattering from concentration fluctuations in one-phase systems was a sensitive function of χ. In most cases, the agreement between experimental data and the standard Flory–Huggins–de Gennes approach is qualitative. We conclude by summarizing advanced theories that have been proposed to address the limitations of the standard approach. In spite of considerable effort, there is no con... |
| Databáze: | OpenAIRE |
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