Effect of particle size and concentration of fluorine-containing polymer on the properties of frost-resistant elastomer based on propylene oxide rubber
https://doi.org/10.31242/2618-9712-2020-25-1-11
Abstract
The article considers problems of operation of elastomers and elastomeric products in cold climates. There are also studies the behavior of elastomeric sealing materials during their operation in extreme climatic conditions and suggestions of the ways of new frost-resistant elastomers development. Based on these ways, elastomeric composites based on mixtures of propylene oxide rubber (SKPO) and fluorine-containing polymers were obtained. SKPO has a unique frost resistance (TG = –74 °C). Following standard methods of rubber technology, polymer composites based on SKPO and polytetrafluoroethylene (PTFE) or ultrafine polytetrafluoroethylene (UPTFE), which differ in the preparation method and degree of dispersion, were studied. These fluoropolymers selected for rubber modification have a low coefficient of friction, resistance in most known liquids, and heat resistance. Using electron microscopy, we studied the structure of elastomeric composites and the features of their phase morphology, depending on the nature of the fluoropolymer used. We revealed the effect of particle size of the dispersed phase and the content of the fluorine-containing component on the phase morphology and properties of elastomeric composites. It was shown that as the content of PTFE (UPTFE) in the mixture increases, the wear and oil resistance of rubbers increases as well, but frost resistance decreases. The addition of UPTFE powder, which has smaller particle sizes, was preferable to obtain elastomeric composites with a high level of low-temperature characteristics and wear and oil resistance. As a result, we obtained frost-resistant elastomeric composites with a balanced set of properties. The developed compositions were patented and recommended for use.
Keywords
elastomeric materials,
propylene oxide rubber,
polytetrafluoroethylene,
ultrafine polytetrafluoroethylene,
wear resistance,
oil resistance,
frost resistance,
phase morphology
Supporting agencies: This work was supported by the Russian Foundation for Basic Research (Grant No. 19-08-00615).
About the Authors
N. N. Petrova
North-Eastern Federal University named after M.K. Ammosov
Russian Federation
Russian Federation
PETROVA Nataliya Nikolaevna, doctor of chemistry, associate professor, professor, head of the chemical department, Institute of Natural Sciences
58 Belinsky st., Yakutsk,677000
V. V. Portnyagina
North-Eastern Federal University named after M.K. Ammosov
Russian Federation
Russian Federation
PORTNYAGINA Viсtoria Vitalievna, candidate of technical sciences, associate professor, Mining Institute
58 Belinsky st., Yakutsk, 677000
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For citations:
Petrova N.N., Portnyagina V.V. Effect of particle size and concentration of fluorine-containing polymer on the properties of frost-resistant elastomer based on propylene oxide rubber. Arctic and Subarctic Natural Resources. 2020;25(1):101-117. (In Russ.) https://doi.org/10.31242/2618-9712-2020-25-1-11
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