Chemical interaction of fluoropolymers with transition metals
| Autor: | Andrey Tarasov, I. V. Arkhangel'skii, A. S. Alikhanian |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
General Chemical Engineering
Metals and Alloys Analytical chemistry chemistry.chemical_element Mass spectrometry Endothermic process Inorganic Chemistry chemistry.chemical_compound Differential scanning calorimetry Transition metal chemistry Molybdenum Materials Chemistry Mass spectrum Molecule Fluoropolymer |
| Zdroj: | Inorganic Materials. 45:809-813 |
| ISSN: | 1608-3172 0020-1685 |
| DOI: | 10.1134/s002016850907019x |
| Popis: | Chemical interaction of transition metals (Mo, W, Ta, Nb, and Ti) with a tetrafluoroethylene-vinylidene fluoride (TFE-VDF) copolymer (21 mol % TFE + 79 mol % VDF) has been studied by differential scanning calorimetry (DSC) and mass spectrometry. The DSC curves of mixtures of the fluoropolymer with Ta, Nb, and Ti showed exothermic peaks, and those of composites with W and Mo showed endothermic peaks. Mass spectrometric analysis indicated that the fluoropolymer reacted with the transition metals to form the higher fluorides TaF5, NbF5, TiF4, WF6, and MoF6. In addition, WOF4 and MoOF4 molecules were detected in the case of tungsten and molybdenum. At temperatures above 700 K, the mass spectra of all the systems showed ions corresponding to low-molecular hydrocarbon molecules. |
| Databáze: | OpenAIRE |
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