Polymer materials based on ultra-high molecular weight polyethylene: structure and properties
https://doi.org/10.31242/2618-9712-2022-27-4-631-642
Abstract
This paper presents the results of a study of the properties and structure of ultra-high molecular weight polyethylene (UHMWPE) depending on grades and molecular weight. We compared the grades of UHMWPE 510 and 517 synthesized in the Federal Research Center Boreskov Institute of Catalysis, and GUR grades 4022, 4130 and 4150 from Celanese (Germany and China). Powders were processed according to the technology of hot pressing in a vulcanizing press in accordance with GOST 16337-77 to obtain samples for research. The structure of the polymers was studied by X-ray diffraction analysis and scanning electron microscopy. The study of powder morphology indicates that UHMWPE powders consist of clusters of smaller subparticles interconnected by polymer fibrils. At the same time, the supramolecular structure of UHMWPE is characterized by the formation of spherulites, the size of which decreases with increasing molecular weight. X-ray patterns of UHMWPE show that with increasing molecular weight, a more defective structure is formed. This phenomenon is confirmed by the method of differential scanning calorimetry, a decrease in the values of the enthalpy of melting and the degree of crystallinity with increasing molecular weight was revealed. We established that the value of the degree of crystallinity and density of Russian-made brand 517 is comparable to foreign brands. In terms of physical, mechanical and tribological parameters, this brand is not inferior to foreign analogues, since it has a high tensile strength, which reaches up to 45 MPa, and a low mass wear rate of 0.07 mg/h.
Supporting agencies: This research was funded by the Ministry of Science and Higher Education of the Russian Federation (grant number [FSRG-2020-0017]). We used the equipment of the Shared core facilities of the Ammosov North-Eastern Federal University.
About the Authors
S. N. Danilova
Ammosov North-Eastern Federal University
Russian Federation
Russian Federation
DANILOVA, Sakhayana Nikolaevna, Junior Researcher, AuthorID: 933163, Researcher ID: AAZ-5494-2021
58 Belinsky st., Yakutsk 677000
A. V. Okoneshnikova
Ammosov North-Eastern Federal University
Russian Federation
Russian Federation
OKONESHNIKOVA, Anastasia Vasilievna, 3rd year student
58 Belinsky st., Yakutsk 677000
A. A. Okhlopkova
Ammosov North-Eastern Federal University
Russian Federation
Russian Federation
OKHLOPKOVA, Aitalina Alexeevna, Dr. Sci. (Engineering), Professor, Chief Researcher, AuthorID: 57856, Researcher ID: A-6594-2014
58 Belinsky st., Yakutsk 677000
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For citations:
Danilova S.N., Okoneshnikova A.V., Okhlopkova A.A. Polymer materials based on ultra-high molecular weight polyethylene: structure and properties. Arctic and Subarctic Natural Resources. 2022;27(4):631-642. (In Russ.) https://doi.org/10.31242/2618-9712-2022-27-4-631-642
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