Environmental Exposure and Accelerated Testing of Rubber-to-Metal Vulcanized Bonded Assemblies
Technical rept. Jul 1972-Jun 1974
ROCK ISLAND ARSENAL IL GENERAL THOMAS J RODMAN LAB
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The purpose of this work is to expose rubber-to-metal vulcanized bonded assemblies to environmental conditions experienced by weapon components in the field and to determine the effect of this exposure on the vulcanized bond. The purpose is also to duplicate these long term environmental effects with an accelerated laboratory test. Four different groups of rubber-to-metal vulcanized bonded assemblies were exposed outdoors in Panama and at Rock Island. Accelerated laboratory testing was conducted using heat and humidity. After one year exposure in Panama the butadiene acrylonitrile rubber bonded assemblies showed a severe loss of 100 percent in bond strength the EPDM bonded assemblies showed a 40 percent loss in bond strength and the SBR and neoprene bonded assemblies showed no loss in bond strength. Accelerated testing did show the same results as environmental exposure, but laboratory test periods up to 56 days are too long for a good accelerated test.
- Physical Chemistry
- Adhesives, Seals and Binders
- Elastomers and Rubber