Accession Number : AD0616322

Title :   EVALUATION OF ETHYLENE PROPYLENE TERPOLYMER ELASTOMERS,

Corporate Author : ROCK ISLAND ARSENAL ILL

Personal Author(s) : Testroet,Frank B.

Report Date : MAR 1965

Pagination or Media Count : 25

Abstract : Commercial EPT elastomers were evaluated to ascertain their potential usefulness in military applications. It was found that EPT elastomers process easily and the resulting vulcanizates possess a unique combination of inherent qualities not available with other general purpose elastomers; i.e., low cost, good stress-strain properties, resistance to ozone attack and degradation caused by thermal oxidative processes coupled with excellent flexibility and resistance to embrittlement at temperatures of -55F. and -85F. respectively. Poor elastic recovery at low temperature is the most notable deficiency of these elastomers. Plasticizers produce an improvement in the good low temperature flexibility of EPT vulcanizates but fail to improve elastic recovery. Plasticizers and process oils are readily compatible with EPT as evidenced by good stress-strain properties of vulcanizates highly extended with plasticizer or oil. Examples of high grade as well as highly extended, low cost compounds are presented. (Author)

Descriptors :   (*ELASTOMERS, PHYSICAL PROPERTIES), (*POLYETHYLENE PLASTICS, PHYSICAL PROPERTIES), VULCANIZATES, STRESSES, STRAIN(MECHANICS), STABILITY, PLASTICIZERS, OILS, COMPATIBILITY

Distribution Statement : APPROVED FOR PUBLIC RELEASE