Mixing enthalpies of polyethers in solvents of various polarity treated with a group contribution theory
| Autor: | Erwin Killmann, Michael Stumbeck |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Isothermal microcalorimetry
Polymers and Plastics Ethylene oxide Organic Chemistry Entropy of mixing Condensed Matter Physics Oligomer Group contribution method chemistry.chemical_compound chemistry Polymer chemistry Materials Chemistry Polymer blend Physical and Theoretical Chemistry Tetrahydrofuran Mixing (physics) |
| Zdroj: | Macromolecular Chemistry and Physics. 200:348-357 |
| ISSN: | 1521-3935 1022-1352 |
| DOI: | 10.1002/(sici)1521-3935(19990201)200:2<348::aid-macp348>3.0.co;2-z |
| Popis: | The mixing enthalpies of different oligoethers (oligomers of tetrahydrofuran and ethylene oxide and a block cooligomer of these ethers) with hydroxyl and acetyl end groups in various solvents (2-propanol, tri- and tetrachloromethane) are obtained by microcalorimetry. An extended group contribution theory, based on a quasichemical equilibrium between contacting segment surfaces, is applied successfully for the description and prediction of the mixing enthalpies. The theory can be used for every kind of molecular interaction, for polar and non-polar interactions as well as for hydrogen bridges. In addition, it is possible to apply the theory to mixing enthalpies of polymer blends. |
| Databáze: | OpenAIRE |
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