Abstract
Radical copolymerization of vinylidene fluoride (1,1-difluoroethylene), hexafluoropropylene (hexa-fluoropropene-1), and perfluoroallyl fluorosulfate (fluorocopolymer C26-FS) was performed in a solution of 1,1,2-trifluoro-2,2,1-trichloroethane in order to create new low-molecular functional fluorocopolymers for cold vulcanization. The optimal copolymerization conditions were determined and a relationship was revealed between the microstructure of the C26-FS fluorocopolymer and its physicomechanical characteristics. 19F NMR spectroscopy was used to identify the structure and determine the number-average molecular mass and composition of the synthesized fluorocopolymers with a fluorosulfate group. The thermal stability in an inert medium and the glass transition temperature of S26-SF and the physicomechanical properties of their vulcanizates were studied. It was shown the properties and vulcanization duration of low-molecular functional fluorocopolymers is affected by the content of perfluoroallyl sulfate units (f = 2–4) relative to the vinylidene fluoride and hexafluoropropylene units in the polymer chain.
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Original Russian Text © G.G. Chernyavskii, G.A. Emel’yanov, V.I. Purtseladze, L.V. Osetrova, 2015, published in Zhurnal Prikladnoi Khimii, 2015, Vol. 88, No. 1, pp. 88–94.
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Chernyavskii, G.G., Emel’yanov, G.A., Purtseladze, V.I. et al. Copolymers of vinylidene fluoride, hexafluoropropylene, and perfluoroallyl fluorosulfate. Russ J Appl Chem 88, 82–88 (2015). https://doi.org/10.1134/S1070427215010127
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DOI: https://doi.org/10.1134/S1070427215010127