Characterization of a single sample of an unknown polymer by size exclusion chromatography
| Autor: | Martel Zeldin, Wilmer K. Fife, Lev Z. Vilenchik, S. Rubinsztajn |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
chemistry.chemical_classification
Chromatography Polymers and Plastics Chemistry Dispersity Size-exclusion chromatography Thermodynamics Viscometer Polymer Condensed Matter Physics Gel permeation chromatography Viscosity chemistry.chemical_compound Siloxane Materials Chemistry Molar mass distribution Physical and Theoretical Chemistry |
| Zdroj: | Journal of Polymer Science Part B: Polymer Physics. 29:1137-1140 |
| ISSN: | 1099-0488 0887-6266 |
| DOI: | 10.1002/polb.1991.090290912 |
| Popis: | The relationship between viscosity constants, k', a and Kη from the equations of Huggins and Mark-Kuhn-Houwink has been considered. It is shown, theoretically, that the sum of k' and a must be constant for all flexible-chain macromolecules irrespective of the solvent used. On this basis, a combination of chromatography and viscometry measurements can be used to characterize a new species. The method has been applied to the new polymer, poly[methyl(pyridin-3-yl) siloxane] (1) where no suitable calibration standards are available. The value of a, k', and Kη for 1 has been calculated. The calculated constants enabled an estimation of different average molecular weights (MnMwMz) and polydispersity (Mw/Mn) from a minimum of experimental data. The new method is general and can be applied to any homogeneous linear flexible-chain nondraining macromolecule. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text