Accession Number : AD0890107

Title :   Thermally Stable Ethylene-Propylene Elastomers.

Descriptive Note : Technical rept. May 67-Feb 70,

Corporate Author : AIR FORCE MATERIALS LAB WRIGHT-PATTERSON AFB OH

Personal Author(s) : Murray, Kermon

Report Date : NOV 1971

Pagination or Media Count : 48

Abstract : New ethylene-propylene elastomer vulcanizates have been developed which have extended heat and oxidation stability over state-of-the-art compounds. Vulcanizate formulations and physical properties are presented. The stability of ethylene- propylene diene type vulcanizates was achieved by a dual stabilization process. The increased thermal and oxidation resistance is characterized by better than 160% retention of tensile strength and elongation after 48 hours exposure to 400 F. This represents nearly a threefold improvement over previous state-of-the-art compounds. (Author, modified-PL)

Descriptors :   *HEAT RESISTANT PLASTICS), (*ELASTOMERS, (*VULCANIZATES, HEAT RESISTANT PLASTICS), THERMAL STABILITY, OXIDATION, DEGRADATION, CROSSLINKING(CHEMISTRY), ANTIOXIDANTS, ADDITIVES.

Subject Categories : Elastomers and Rubber

Distribution Statement : APPROVED FOR PUBLIC RELEASE