MATERIAL - ELASTOMERS - TEFLON, NEOPRENE, TA-77 SYNTHETIC RUBBER (T. A. MANUFACTURING CORP.). AROMATIC FUEL AND WEATHERING RESISTANCE
GENERAL DYNAMICS CORP POMONA CA POMONA DIV
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Suitable specimens of general purpose neoprene AMS 3209 aromatic fuel resistant neoprene AMS 3215 TA-77 synthetic rubber and teflon were subjected to various environmental tests. Atlas Type XW Weatherometer exposure for 250 hours and ozone exposures ASTM Method 1149-55T resulted in no cracking in the teflon and general purpose neoprene AMS 3209, but the T. A. synthetic rubber and aromatic fuel resistant neoprene AMS 3215 cracked. Heating at 212 F for 70 hours did not appreciably harden any of the four materials. Twenty-four hours immersion in JP4 fuel caused only very slight swelling of teflon, but the two neoprene materials and the TA-77 synthetic rubber swelled considerably as a result of immersion.
- Elastomers and Rubber