EFFECTS OF NUCLEAR RADIATION AND VARIOUS ENVIRONMENTS ON A NUMBER OF SELECTED PLASTIC, GLASS-LAMINATE, AND CERAMOPLASTIC MATERIALS.
Rept. for 1 Oct 63-25 Mar 65,
GENERAL DYNAMICS/FORT WORTH TEX NUCLEAR AEROSPACE RESEARCH FACILITY
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Eight plastic materials were irradiated under various environmental conditions and subsequently tested to determine changes in tensile properties, hardness, and specific gravity. Merlon polycarbonate was irradiated to six gamma dose levels in air at 75F and two dose levels in a vacuum of approximately 3 x 10 to the minus 7th power torr. Plestar polycarbonate film was irradiated to six dose levels in air at 75F. The acrylonitrilebutadiene-styrene ABS plastics Kralastic MV and SRA received six doses in air at 75F, six doses in air at 240F, and two doses in vacuum. Kralastic SR and a glass-reinforced diallyl phthalate were irradiated to three dose levels in air at 75F and to two doses in vacuum. Supramica 500 ceramoplastic received three doses in air at 75 and 240F. Maximum gamma dose in air and in vacuum was 2 x 10 to the 11th power and 3.2 x 10 to the 10th power ergsgmC, respectively. Irradiations were performed with the Ground Test Reactor at the Nuclear Aerospace Research Facility. All materials except the polyn-vinyl carbazole, diallyl phthalate, and ceramoplastic were severely damaged at the highest doses. Author