Ageing of chemically modified poly(vinylidene fluoride) film: Evolution of triple carbon-carbon bonds infrared absorption
| Autor: | V. A. Greshnyakov, L. A. Pesin, V. E. Zhivulin, Maria Brzhezinskaya, E.A. Belenkov, N. A. Zlobina |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Polymers and Plastics Carbonization Infrared chemistry.chemical_element Infrared spectroscopy 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences poly vinylidene fluoride PVDF carbyne chemical carbonization long term ageing IR absorption spectroscopy density functional calculations 0104 chemical sciences Absorbance chemistry.chemical_compound chemistry Chemical engineering Mechanics of Materials Materials Chemistry Molecule 0210 nano-technology Absorption (electromagnetic radiation) Carbon Fluoride |
| Zdroj: | Polymer Degradation and Stability. 172:109059 |
| ISSN: | 0141-3910 |
| DOI: | 10.1016/j.polymdegradstab.2019.109059 |
| Popis: | The paper presents the results of the combined investigation of changes in the poly(vinylidene fluoride) (PVDF) structure caused by chemical carbonization and subsequent long-term ageing, as one of the most promising ways to synthesize the 1D modification of chemically pure carbon, carbyne. For the first time, the ageing process of PVDF was monitored during extremely wide time-frame from 19 to 500000 min. The evolution of PVDF molecular structure was investigated experimentally by infrared and X-ray absorption spectroscopies. As a result, non-monotonic variation of triple carbon-carbon bonds infrared absorption in the course of long-term ageing was revealed, as well as new aspects of PVDF carbonization. The series of appropriate molecular complexes were modeled, for which characteristic frequencies and absorbance intensities in the IR spectra were simulated by the DFT-LDA method and applied to interpret the results of the experimental study. |
| Databáze: | OpenAIRE |
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