Molecular structure of chemically carbonized poly (vinylidene fluoride) films (IR-spectroscopy data)
The relevance of the research is caused by the importance of elaboration and improvement of the carbon-based nanomaterials synthesis technique. Synthesis of a chain-like carbon and study of its properties are of fundamental interest for experimental check of compliance of numerous models of one-dime...
| Main Authors: | , , |
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| Format: | Article |
| Language: | Russian |
| Published: |
Tomsk Polytechnic University
2018-08-01
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| Series: | Известия Томского политехнического университета: Инжиниринг георесурсов |
| Subjects: | |
| Online Access: | http://izvestiya.tpu.ru/archive/article/view/2075 |
| Summary: | The relevance of the research is caused by the importance of elaboration and improvement of the carbon-based nanomaterials synthesis technique. Synthesis of a chain-like carbon and study of its properties are of fundamental interest for experimental check of compliance of numerous models of one-dimensional structures to a real physical object. Chemical treatment of poly (vinylidene fluoride) in a liquid dehydrofluorinating medium allows obtaining a carbon/rich layer on the polymer surface containing chains of various lengths in which carbon atoms are connected to each other with either double bonds or alternating single and triple ones. Theoretical calculations predict a semiconductor-type conductivity of the material, which makes it interesting for use in the field of micro- and nanoelectronics. The main aim is to reveal changes in the molecular composition of polyvinylidene fluoride as a result of chemical dehydrofluorination and subsequent storage at normal and reduced air pressure. Object of the research is a chemically dehydrofluorinated poly (vinylidene fluoride) film. Method of research is infrared spectroscopy. Results. During chemical dehydrofluorination of poly (vinylidene fluoride) the fluorine-substituted polyene fragments, as well as conjugated double and triple carbon-carbon bonds are formed. Hydroxyl groups, contained in water, in the components of dehydrofluorinating mixture and in the atmospheric air, attach to the carbon chains thus preventing conjugated carbon-carbon bonds generation. Drying of the samples, dehydrofluorinated in a liquid medium, under reduced pressure promotes the formation of longer chain fragments, in which the carbon atoms are interconnected by multiple bonds. The observed increase in triple carbon-carbon bonds IR absorption band at 2050-2100 cm-1most obviously shows occurrence of the carbine-like atomic arrangement of polyyne type. |
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| ISSN: | 2500-1019 2413-1830 |