VITON®: A High Performance Fluorocarbon Elastomer for Use in Hostile Environments

Knox, R.E.; Nersasian, A.

doi:10.4271/770867

Cited by 6 publications

(2 citation statements)

References 2 publications

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“…The commercially available standard Viton has three main cure chemistries of families. Vinylidene fluoride (VF2) and hexafluoropropylene (HFP) refer to the Viton family of A. Vinylidene fluoride (VF2), hexafluoropropylene (HFP), and tetrafluoroethylene (TFE) embraced with Viton family B and F. Due to the excellent resistance capability of low molecular weight esters, ketones, and aldehydes, Viton ETP was introduced in 1998, which was comprised of ethylene, tetrafluoroethylene (TFE), and perfluoromethyl vinyl ether (PMVE) [ 25 , 26 , 27 , 28 , 29 ]. Viton rubber has a density of over 1800 kg/m 3 , which is higher than other types of rubber polymer, and a fluorine content of 66 to 70% [ 30 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

Volume Resistivity of Viton Polymer under Thermal Aging

2021

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This study examines the influence of various electrical parameters on the volume resistivity of the Viton fluoroelastomer. The transient current, the temperature dependence of volume resistivity, the voltage dependence of resistivity, and the surface morphology of Viton insulators are investigated for new and aged specimens. An accelerated aging process has been employed in order to simulate the natural aging of insulators in service. A detailed comparison between the new and aged samples is presented. The transient effect, which is a challenge to the resistivity measurement of insulators, has been investigated. The first 60 s of the resistivity measurement test showed a significant influence from the transient effect and should be excluded from the data. The volume resistivity of both new and aged samples decreased when the temperature increased. However, the resistivity of the aged sample was lower than the new one at all tested temperatures. When the temperature increased from 35 to 190 °C, resistivity decreased from 4.77 × 1010 to 6.99 × 108 Ω-cm for the new sample and from 2.6 × 1010 to 6.68 × 108 Ω-cm for the aged sample under 500 V. Additionally, the results from this study showed that the volume resistivity is inversely proportional to the applied voltage. Finally, scanning electron microscope (SEM) micrographs/images allowed us to closely examine the surface morphology of new and aged Viton samples. The surface of aged samples has been recognized with higher surface roughness and more significant surface cracks leading to poor performance under high voltage applications.

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Section: Introductionmentioning

confidence: 99%

Volume Resistivity of Viton Polymer under Thermal Aging

2021

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“…In Table 14.7, heat and oil resistance of some fluorocarbon rubbers are compared with a few other rubbers. 18,19 In Table 14.8 the fluoroelastomers are compared with one another. These comparisons are approximations representing a variety of compounds and are intended only to point out salient features and differences between types.…”

Section: Physical Properties Of Cured Fluorocarbon Rubbersmentioning

confidence: 99%