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THE EFFECTS OF REACTOR RADIATION ON THE PHYSICAL PROPERTIES OF TWO RADIATIONRESISTANT O-RING COMPOUNDS.
Final rept. for 1 Oct 63-30 Sep 64,
GENERAL DYNAMICS/FORT WORTH TEX
Pagination or Media Count:
Two O-ring compounds specially formulated for radiation resistance - PRPC 1387 and PRPC 4387 Acrylonitrile-Butadiene Styrene-Butadiene - were irradiated to six gamma dose levels in the range of from 4.9 x 10 to the 8th power to 1.5 x 10 to the 11th power ergsgmC. O-rings, tensile specimens, and compression-set buttons of both materials were irradiated in air at or near room temperature. O-rings of PRPC 1387 were also irradiated in oil. Tensile properties, hardness, compression set, weight change, and specific gravity were measured as a function of radiation dose. Several analytical procedures were used in interpreting the data. The wide range of doses employed in the experiment provides an accurate assessment of degradation produced by radiation. The highest dose resulted in complete loss of useful mechanical properties. The properties most adversely affected at lower doses were ultimate elongation, hardness, and compression set. However, both materials exhibit good radiation resistance and appear to be useful up to doses of at least 10 to the 10th power ergsgmC. Author
APPROVED FOR PUBLIC RELEASE