Multidimensional 19F NMR Analyses of Terpolymers from Vinylidene Fluoride (VDF)–Hexafluoropropylene (HFP)–Tetrafluoroethylene (TFE)
| Autor: | Peter L. Rinaldi, Elizabeth Forrester Mccord, Donald F. Lyons, Eric B. Twum |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics Organic Chemistry Polymer Fluorine-19 NMR Inorganic Chemistry chemistry.chemical_compound Monomer chemistry Heteronuclear molecule Polymer chemistry Materials Chemistry Copolymer Physical chemistry Tetrafluoroethylene Hexafluoropropylene Two-dimensional nuclear magnetic resonance spectroscopy |
| Zdroj: | Macromolecules. 48:3563-3576 |
| ISSN: | 1520-5835 0024-9297 |
| DOI: | 10.1021/acs.macromol.5b00200 |
| Popis: | The use of multidimensional NMR methods for the characterization of polymer microstructure has been applied to terpolymers from vinylidene fluoride (VDF), hexafluoropropylene (HFP), and tetrafluoroethylene (TFE). By assembling the atomic connectivity information obtained from different multidimensional NMR experiments, selective 19F–19F COSY (correlation spectroscopy), 19F–19F gradient double-quantum COSY, and 19F–13C gradient heteronuclear single-quantum coherence (gHSQC), among others, the detailed monomer sequence arrangements in the terpolymer were obtained. Obtaining the resonance assignments of the terpolymer was greatly aided by the extrapolation of known resonance assignments from PVDF homopolymer, poly(VDF-co-HFP) copolymer, and poly(VDF-co-TFE) copolymer. A tabulated comparison of the microstructure assignment of resonances from PVDF homopolymer as well as poly(VDF-co-HFP) and poly(VDF-co-TFE) copolymers and the terpolymer is provided. Detailed comparisons of 19F spectra from 470 and 658.4 MHz s... |
| Databáze: | OpenAIRE |
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