Applications of esr techniques to the study of free radical processes and kinetics in acrylic polymerizations
| Autor: | David G. Westmoreland, Willie Lau, Hsiu‐Rong Chang, Hsing-Yeh Parker |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Quenching (fluorescence)
Polymers and Plastics Spin trapping Chemistry Butyl acrylate Radical Organic Chemistry Emulsion polymerization Condensed Matter Physics Photochemistry law.invention Styrene chemistry.chemical_compound law Materials Chemistry Methyl methacrylate Electron paramagnetic resonance |
| Zdroj: | Macromolecular Symposia. 111:253-263 |
| ISSN: | 1022-1360 |
| DOI: | 10.1002/masy.19961110123 |
| Popis: | Electron spin resonance (ESR) techniques have been applied to a detailed study of batch and semicontinuous emulsion polymerization of methyl methacrylate; butyl acrylate and styrene have been briefly studied. Quenching of samples from the polymerization reactor followed by ESR analysis are useful, but we have developed continuous flow techniques which are preferable in many cases. ESR techniques can provide valuable information relating to the nature of free radical reactions, the concentration of propagating free radicals, and the kinetic processes in these reactions. Direct ESR analysis is most valuable but is not applicable to all systems. Spin trapping techniques can be useful for systems not accessible by direct analysis. |
| Databáze: | OpenAIRE |
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