Evaluation of Rheological Properties of Polytetrafluoroethylene/Isoparaffin
Vol. 58, No. 4, pp. 177-182,
Aug. 2021
10.12772/TSE.2021.58.177
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Abstract
The effect of isoparaffin on the rheological properties of polytetrafluoroethylene
(PTFE) was investigated. PTFE/isoparaffin paste was prepared for two different types of isoparaffin,
that is, Isopars G and M, which can be used as PTFE lubricants. Molecular dynamics
(MD) simulations were applied to investigate the effect of the lubricants on the zero-shear
viscosity of the PTFE/isoparaffin system. The Green-Kubo relationship was used to obtain
the zero-shear viscosity through the MD simulations. In the relationship, the autocorrelation
function of the shear stress was calculated and integrated over time. The shear viscosity
of PTFE/Isopar G was lower than that of PTFE/Isopar M, corresponding to the experimental
results.
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