Online-Analysis on Acoustically Levitated Droplets
| Autor: | Mohammed Abboud, Silke Biedasek, Achim Stammer, Hans-Ulrich Moritz |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Aqueous solution
Polymers and Plastics Organic Chemistry technology industry and agriculture Analytical chemistry Evaporation Solution polymerization macromolecular substances Condensed Matter Physics Acoustic levitation chemistry.chemical_compound symbols.namesake Monomer chemistry Polymerization Materials Chemistry symbols Raman spectroscopy Acrylic acid |
| Zdroj: | Macromolecular Symposia. 259:390-396 |
| ISSN: | 1521-3900 1022-1360 |
| DOI: | 10.1002/masy.200751344 |
| Popis: | Aqueous solutions of acrylic acid were levitated in a 40 kHz acoustic levitator. The monomer amount in the levitated droplets was monitored by Raman spectroscopy relating to an internal standard. Thus evaporation of the monomer as well as polymerization reactions initiated by a redox system were investigated by Raman spectroscopy and resultant data were compared to HPLC data. Decreases in monomer amount due to evaporation can be clearly distinguished from polymerization reactions. Additionally, temperature measurement within the droplet throughout a polymerization reaction shows the typical temperature course originating from the heat of polymerization. |
| Databáze: | OpenAIRE |
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