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Stress Relaxation of Ethylene/Acrylic and Other Gasket Materials in Automotive Fluids
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Abstract
Compression stress relaxation is becoming an increasingly useful tool to determine how well a sealing material will perform in various environments. While stress relaxation data has been published on some rubber materials, there is very little recent data for ethylene/acrylic elastomer, even though it is one viable option for engine and transmission gasket applications. In addition, three new grades of ethylene/acrylic elastomer have been recently commercialized, all of which make very suitable gasket materials. This makes it very timely to investigate the performance of this family of sealing materials.
The purpose of this paper is to measure compression stress relaxation for these new grades of ethylene/acrylic in both SG engine oil and automatic transmission fluid for extended periods of time. The results of the ethylene/acrylic grades will also be compared to those of functionally competitive materials, such as polyacrylate and silicone.
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Authors
Citation
Kotz, D. and Dobel, T., "Stress Relaxation of Ethylene/Acrylic and Other Gasket Materials in Automotive Fluids," SAE Technical Paper 940959, 1994, https://doi.org/10.4271/940959.Also In
References
- Dobel T. M. Harrell J. R. “New Developments in Ethylene/Acrylic Elastomers,” Paper No. 28, 140th Meeting Rubber Division ACS October 1991
- Dobel T. M. Kotz D. A. “Ethylene/Acrylic High Performance Elastomers -Extended Agings in Selected Automotive Fluids,” Paper No. 97, 144th Meeting Rubber Division ACS October 1993
- Smith K. C. “Stress Relaxation, The Forgotten Phenomenon,” January 1993
- Bunting W. M. et al. “Compression Stress Relaxation I: An Important Test for Evaluation of Sealant Materials,” SAE Paper No. 920135 February 24 - 28 1992
- “Minutes: ASTM Committee D11.14 - Stress Relaxation in Compression,” June 22 1993
- ISO International Standard 3384 “Rubber, Vulcanized - Determination of Stress Relaxation in Compression at Ambient and at Elevated Temperatures,” 1986