PTFE Micropowder Functionalized with Carboxylic Acid Groups
| Autor: | Uwe Lappan, Uwe Geißler |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
chemistry.chemical_classification
Polymers and Plastics Decarboxylation Chemistry General Chemical Engineering Carboxylic acid Organic Chemistry Potentiometric titration Polyelectrolyte chemistry.chemical_compound Carboxylation Sodium hydroxide Oxidizing agent Polymer chemistry Materials Chemistry Titration |
| Zdroj: | Macromolecular Materials and Engineering. 293:538-542 |
| ISSN: | 1439-2054 1438-7492 |
| DOI: | 10.1002/mame.200800022 |
| Popis: | PTFE powder irradiated in air at room temperature was studied by infrared spectroscopy, potentiometric titration with sodium hydroxide, and polyelectrolyte titration with poly(diallyl dimethylammonium chloride). Through the radiation-induced degradation -COF groups are formed in the material, which can be hydrolyzed to -COOH groups. About 10-20% of the -COOH groups are located at the surface of the PTFE particle. The -COOH groups start to decompose under oxidizing conditions at temperatures above 200 °C. The decarboxylation results in the formation of -CF=CF 2 groups, which are oxidized to -COF groups in the presence of air. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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