THE IMPACT OF IMPROVED TECHNOLOGY PRESSING ON STRUCTURE FORMATION POLYTETRAFLUOROETHYLENE
JCAATM
DOI:
https://doi.org/10.25712/ASTU.2072-8921.2024.01.031Keywords:
Polytetrafluoroethylene, low-frequency modulation, ultrasonic effect, properties, structure.Abstract
. The article discusses the improvement of the technological process of pressing polytetrafluoroethylene, with the aim of increasing its performance properties, durability and wear resistance for use in polymer composite materials used in parts of various friction units. A comparison was made of the influence of technological pressing modes on mechanical properties, tribotechnical characteristics, friction surface relief, as well as on the supramolecular structure of polytetrafluoroethylene.
As a result of research, it was established that the use of the technological mode of ultrasonic pressing with a frequency of 17 kHz and simultaneously superimposed low-frequency amplitude modulation of 100 Hz for pressing products made of polytetrafluoroethylene allows increasing the tensile strength by 9%, relative elongation by 9%, modulus elasticity by 6% and reduce the intensity of mass wear by 22%, friction coefficient by 24%. The use of low-frequency modulation leads to a change in the relief of the friction surface and to obtaining a more uniform, ordered and homogeneous PTFE structure.
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Copyright (c) 2024 Dmitriy A. Negrov, Vitaliy Yu. Putintsev, Alexey Ig. Glotov
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