Accession Number:

AD0420418

Title:

SIX YEAR INDOOR AND OUTDOOR AGING OF ELASTOMERIC VULCANIZATES,

Descriptive Note:

Corporate Author:

ROCK ISLAND ARSENAL ILL

Personal Author(s):

Report Date:

1963-07-16

Pagination or Media Count:

33.0

Abstract:

SBR, NR and NBR vulcanizates employing sulfuraccelerator, accelerator only and peroxide curing systems were aged indoors and outdoors for a period of six years. Properties were determined at intervals of six months, one, two, four and six years. The value of including an antioxidant to improve aging was found to vary with the type of curing system. The nature of the curing system had a decided effect on aging, especially outdoors. In most cases, the vulcanizates aged more outdoors than indoors. In a few instances they resisted aging as well outdoors as indoors. The low temperature flexibility remained virtually unchanged after six years outdoors or indoors. Accelerated air oven aging tests conducted at 212 F were found to give a fairly good indication of how the variously cured vulcanizates might be expected to age outdoors during the six year period. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE