|
| Study of Stress Accelerated Aging Behavior of Sulfured Nitrile-butadiene Rubber |
| Received:January 10, 2012 Revised:June 15, 2012 |
| View Full Text View/Add Comment Download reader |
| DOI： |
| KeyWord:NBR stress accelerated aging life forecast |
| Author | Institution |
| XIONG Ying |
Sichuan University， Chengdu ， China |
| FU Bao-qiang |
Kaidi Northwest Rubber Limited Company， Xianyang ， China |
| GUO Shao-yun |
Sichuan University， Chengdu ， China |
| LU Zhong |
Sichuan Provincial Economic and Information Commission， Chengdu ， China |
|
| Hits: |
| Download times: |
| Abstract: |
| The storage life of nitrile-butadiene rubber (NBR) was calculated according to Arrhenius equation by using high temperature accelerated aging method and the criterion of elongation. The aging behavior of NBR under different stress was studied and the aging mechanism was discussed. The results showed that stress has important impact on aging behavior of NBR; when there is no stress, NBR′ s storage life is over 19 years according to Arrhenius equation; its storage life reduces 50% under bending stress; its storage life is less than 2 years under tensile-bending stress. This is because stress will induce the orientation and deformation of NBR molecular chain, and change and restrain its bond lengths and bond angles, which also reduce the breaking activation energy of the molecular chain, accelerate the aging process, and shorten the storage life or the service life of NBR. |
| Close |