Infrared spectroscopic study on the crystallization of water in poly(vinyl methyl ether) aqueous solution during heating
| Autor: | Yulan Lu, Jianye Wang, Gaoyong Zhang, Deyan Shen, Zhang Jingliu |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
chemistry.chemical_classification
Aqueous solution Polymers and Plastics Chemistry Hydrogen bond Ether Polymer Condensed Matter Physics medicine.disease law.invention chemistry.chemical_compound law Polymer chemistry Materials Chemistry medicine Dehydration Physical and Theoretical Chemistry Crystallization Fourier transform infrared spectroscopy Methyl group Nuclear chemistry |
| Zdroj: | Journal of Polymer Science Part B: Polymer Physics. 40:2772-2779 |
| ISSN: | 1099-0488 0887-6266 |
| DOI: | 10.1002/polb.10334 |
| Popis: | The Fourier transform infrared (FTIR) results are consistent with the differential scanning calorimetric results and verify the anomalous crystallization of water in 50% poly(vinyl methyl ether) aqueous solution during heating. Below about -34 °C, the water/polymer complex was not damaged, and the water still associated with the polymer. When heating to about -34 °C, the associated water started to free from the unpolar (methyl group) and polar-site (ether-oxygen group) interaction fields of polymer gradually. Then crystallization of water was induced in this system at temperatures ranging from -34 to -24 °C. The FTIR data also indicate that the structure of water started to change first upon forming strong H bonds among water molecules, and then the dehydration of the polymer began to proceed subsequently when the anomalous crystallization of water occurred. |
| Databáze: | OpenAIRE |
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