SIX YEAR INDOOR AND OUTDOOR AGING OF ELASTOMERIC VULCANIZATES,
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 16, 1963
- Accession Number
- AD0420418
Entities
People
- E. W. Bergstrom