Propagation rate coefficients for homogeneous phase VDF-HFP copolymerization in supercritical CO2
- For the first time, propagation rate coefficients, kp,COPO, for the copolymerizations of vinylidene fluoride and hexafluoropropene have been determined. The kinetic data was determined via pulsed-laser polymerization in conjunction with polymer analysis via size-exclusion chromatography, the PLP-SEC technique. The experiments were carried out in homogeneous phase with supercritical CO2 as solvent for temperatures ranging from 45 to 90 degrees C. Absolute polymer molecular weights were calculated on the basis of experimentally determined MarkHouwink constants. The Arrhenius parameters of kp,COPO vary significantly compared with ethene, which is explained by the high electronegativity of fluorine and less intra- and intermolecular interactions between the partially fluorinated macroradicals.
| Verfasserangaben: | Rebekka Siegmann, Eleonore Möller, Sabine BeuermannORCiDGND |
|---|---|
| DOI: | https://doi.org/10.1002/marc.201200115 |
| ISSN: | 1022-1336 |
| Titel des übergeordneten Werks (Englisch): | Macromolecular rapid communications |
| Verlag: | Wiley-VCH |
| Verlagsort: | Weinheim |
| Publikationstyp: | Wissenschaftlicher Artikel |
| Sprache: | Englisch |
| Jahr der Erstveröffentlichung: | 2012 |
| Erscheinungsjahr: | 2012 |
| Datum der Freischaltung: | 26.03.2017 |
| Freies Schlagwort / Tag: | copolymerization; fluorinated olefins; kinetics (polym); pulse laser initiated polymerization; radical polymerization |
| Band: | 33 |
| Ausgabe: | 14 |
| Seitenanzahl: | 6 |
| Erste Seite: | 1208 |
| Letzte Seite: | 1213 |
| Fördernde Institution: | Dyneon GmbH; Deutsche Forschungsgemeinschaft (DFG) [BE2032/2-1]; EU; state of Brandenburg within the Hochschulinvestitionsprogramm |
| Organisationseinheiten: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie |
| Peer Review: | Referiert |
