Phase behaviour of poly( N -vinyl caprolactam) in water
| Autor: | Frank Meeussen, F. Du Prez, Eric Nies, Eric J. Goethals, Sam Verbrugghe, Hugo Berghmans |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
chemistry.chemical_classification
Molar mass Aqueous solution Materials science Polymers and Plastics Organic Chemistry Caprolactam Thermodynamics Polymer Lower critical solution temperature law.invention chemistry.chemical_compound chemistry law Phase (matter) Polymer chemistry Materials Chemistry Crystallization Glass transition |
| Zdroj: | Polymer. 41:8597-8602 |
| ISSN: | 0032-3861 |
| Popis: | The solution behaviour of the system poly(N-vinyl caprolactam)/water has been studied. Experiments and theoretical calculations indicate a typical Flory–Huggins (Type I) demixing behaviour with a lower critical solution temperature (LCST). The critical concentration and LCST shift to lower values with increasing molar mass of the polymer. The phenomenological description of such a system predicts a continuous temperature controlled swelling behaviour of the corresponding network. A comparison with literature data confirms this prediction. A calorimetric study of the crystallisation and melting behaviour of water and the concentration dependence of the glass transition temperature, gives no evidence for the formation of a polymer/solvent complex. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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