| Modeling of Ageing Property of Nitrile Butadiene Rubber Based on Kinetics Model |
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| DOI： |
| Key Words: nitrile butadiene rubber ； ageing ； Kinetics model； microscopic flaws ； mechanical property |
| Author Name | Affiliation | | ZHANG Kun | Beijingl University of Aeronautics and Astronautics | | YAO Jin-yong | Beijingl University of Aeronautics and Astronautics | | JIANG Tong-min | Beijingl University of Aeronautics and Astronautics |
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| Abstract: |
| In this study，a mathematical model was proposed based on the correlation between mechanical property and microscopic ageing mechanisms of nitrile butadiene rubber（NBR） material， in order to predict the performance change of NBR sealing during ageing process. Oxidative cross-linking and molecular chain scission were two main microscopic mechanisms，which could induce performance degradation of NBR. The degradation trend of mechanical property was revealed by Kinetics model considering both mechanisms. And then the thermal-oxidative ageing model of NBR was developed for seal service life evaluation. Compression set of NBR was obtained by thermal-oxidative accelerated ageing tests at different temperatures. The results showed that ， NBR ageing model based on the Kine tics model was effective compared with the current ageing model for rubber. The modeling process associated mechanical property with microscopic ageing mechanisms was a new approach for ageing analysis of rubber，which would be used for ageing life evaluation of all rubbers. |
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