New Elastomers are More Resistant to Many Automotive Fluids

Hull, D. E.; Eggers, R.; Horemans, Eduard

doi:10.4271/890361

Cited by 6 publications

(1 citation statement)

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“…The variation in the mechanical properties of the elastomers obtained in this research, even when, in some cases, they do not fulfil the transmission manufacturers specifications, are better than the results reported by Vaiden [24], Hull [25], Zeng and Dickerman [26], or Dobel and Bauerle [27]. This indicates the improvement of elastomeric technology that has taken place.…”

Section: Changes In Tensile Strength and Elongation At Breakcontrasting

confidence: 60%

Automatic Transmission Fluids in Electrified Transmissions: Compatibility with Elastomers

et al. 2022

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The location of the electric motor (EM) inside the transmission in an electric vehicle requires the compatibility of the automatic transmission fluids (ATFs) with the materials of the EM and the transmission. This work studies the compatibility of four conventional ATFs with three elastomers: fluoroelastomer (FKM), ethylene-propylene-diene monomer (EPDM), and vinyl-methyl silicone rubber (silicone). Changes in volume, hardness, tensile strength, and elongation at break of the elastomers after aging in the ATFs were measured, and additional Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and thermogravimetric and derivative thermogravimetric (TGA and DTGA) tests were performed. The four ATFs showed high or medium compatibility with FKM and silicone, and low compatibility with EPDM. This low compatibility was related to changes in the composition and crystalline structure of the elastomer. The non-compatibility of the EPDM with the oils from Group III was also proven.

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