Theory of chromatography of partially cyclic polymers: Tadpole-type and manacle-type macromolecules
| Autor: | Alexei A. Gorbunov, Andrey V. Vakhrushev |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Polymers
Size-exclusion chromatography 02 engineering and technology 010402 general chemistry 01 natural sciences Biochemistry Analytical Chemistry Adsorption Animals Physics::Chemical Physics Topology (chemistry) chemistry.chemical_classification Molar mass Chromatography Organic Chemistry General Medicine Polymer Models Theoretical Tadpole (physics) 021001 nanoscience & nanotechnology 0104 chemical sciences Molecular Weight Partition coefficient chemistry Chromatography Gel 0210 nano-technology Chromatography Liquid Macromolecule |
| Zdroj: | Journal of Chromatography A. 1433:56-65 |
| ISSN: | 0021-9673 |
| Popis: | A theory of chromatography is developed for partially cyclic polymers of tadpole- and manacle-shaped topological structures. We present exact equations for the distribution coefficient K at different adsorption interactions; simpler approximate formulae are also derived, relevant to the conditions of size-exclusion, adsorption, and critical chromatography. Theoretical chromatograms of heterogeneous partially cyclic polymers are simulated, and conditions for good separation by topology are predicted. According to the theory, an effective SEC-radius of tadpoles and manacles is mostly determined by the molar mass M, and by the linear-cyclic composition. In the interactive chromatography, the effect of molecular topology on the retention becomes significant. At the critical interaction point, partial dependences K(Mlin) and K(Mring) are qualitatively different: while being almost independent of Mlin, K increases with Mring. This behavior could be realized in critical chromatography-for separation of partially cyclic polymers by the number and molar mass of cyclic elements. |
| Databáze: | OpenAIRE |
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