Tribology Letters

, 67:86 | Cite as

Influence of Thermal Aging in Oil on the Friction and Wear Properties of Nitrile Butadiene Rubber

  • Bingqi Jiang
  • Xiaohong Jia
  • Zixi Wang
  • Tao WangEmail author
  • Fei GuoEmail author
  • Yuming Wang
Original Paper


An experimental study on the influence of thermal aging on the friction and wear properties of a nitrile butadiene rubber (NBR)–steel pair was carried out. Rubber specimens were aged in hydraulic oil at 60 °C and 90 °C for 0–70 days. The Shore hardness, Young’s modulus, rebound resilience, and other mechanical properties were measured. The friction coefficient and wear volume were tested to evaluate the tribology performance. To investigate the mechanism of NBR thermal aging, the molecular structure and crosslinking degree were analyzed. Crosslinking with rubber aging in oil led to differences in the physical and mechanical properties. The Shore A hardness decreased initially and then increased. The Young’s modulus increased and the rebound resilience decreased. The friction coefficient increased but the wear volume decreased with aging time. These differences affected the friction and wear behavior of the NBR against the steel shafts and resulted in sealing-ring degradation and failure.


Nitrile butadiene rubber Aging Friction Wear 



The work described in this paper has been supported by the National Natural Science Foundation of China (Grant Nos. 51505249, 51575300, 51735006) and Independent Research Project of State Key Laboratory of Tribology (Grant No. SKLT2016B09).


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Authors and Affiliations

  1. 1.State Key Laboratory of TribologyTsinghua UniversityBeijingChina
  2. 2.Joint Research Center for Rubber and Plastic SealsTsinghua UniversityBeijingChina
  3. 3.Science and Technology on Vehicle Transmission LaboratoryChina North Vehicle Research InstituteBeijingChina

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