Accelerated aging of EPDM and butyl elastomers | Zendy

M.H. Wilson | Zendy

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Accelerated aging of EPDM and butyl elastomers

Author(s) -

M.H. Wilson

Publication year - 1996

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/243447

Subject(s) - epdm rubber , materials science , ethylene propylene rubber , elastomer , composite material , shore durometer , relaxation (psychology) , stress relaxation , natural rubber , copolymer , polymer , psychology , social psychology , creep

This study was composed of three parts: a post cure study to optimize final properties of an ethylene-propylene-diene (EPDM) formulation, an accelerated aging study to compare the stress relaxation behavior of a butyl and an EPDM elastomer under compression, and a cursory evaluation of a new 70 Shore A EPDM. The optimum postcure for the EPDM was found to be 2 to 4 hours at 182{degrees}C in a vacuum. The EPDM was also shown to have superior aging characteristics compared to the butyl and is recommended for use instead of the butyl material. The physical properties for new 70 Shore A EPDM are satisfactory, and the stress relaxation behavior was only slightly inferior to the other EPDM

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