Competitive hydrogen-bonding in polymer solutions with mixed solvents
| Autor: | Wendy E. Krause, Rebecca R. Klossner, John H. van Zanten, Ravi Shankar, Fumihiko Tanaka, Richard J. Spontak, Coray M. Colina, Juan T. Weaver, Tsuyoshi Koga |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
chemistry.chemical_classification
Quantitative Biology::Biomolecules Ethylene oxide Hydrogen bond Viscometer General Chemistry Polymer Condensed Matter Physics Physics::Fluid Dynamics Condensed Matter::Soft Condensed Matter Solvent Shear rate chemistry.chemical_compound Viscosity Chemical engineering chemistry Polymer chemistry Methanol Physics::Chemical Physics |
| Zdroj: | Soft Matter. 5:304-307 |
| ISSN: | 1744-6848 1744-683X |
| DOI: | 10.1039/b808479c |
| Popis: | Poly(ethylene oxide) (PEO) coil size is investigated in a binary mixture of solvent molecules capable of cooperatively hydrogen-bonding with each other, as well as with the PEO chains. Viscometry reveals a minimum in zero shear rate solution viscosity at a molar ratio of ∼2:1 water:methanol. This viscosity coincides with a minimum in PEO gyration radius and occurs near the conditions where water/methanol mixtures deviate most markedly from ideal solution behavior. A minimum in polymer mean square end-to-end distance is predicted for polymer solutions composed of two hydrogen-bonding solvents. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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