Simulation Study of Thermal and Oxygen Aging and Friction Properties of Molybdenum Disulfide/Nitrile Butadiene Rubber
In order to investigate the effect of molybdenum disulfide(2H-MoS2)on the thermo-oxidative aging and tri-bological properties of the composites of antioxidant 4020 and nitrile butadiene rubber(NBR),molecular dynamics(MD)simulations were used to establish the models of 4020/NBR and MoS2/4020/NBR composites,respectively.The effects of 2H-MoS2 on the thermo-oxidative aging properties,mechanical properties,and tribological properties of the composites at different temperatures were analyzed.The results show that the compatibility,stability and thermo-oxidative aging properties of the composites are effectively improved after adding MoS2,and the mechanical properties are also significantly improved.Even at a high temperature of 398 K,the composite can show excellent thermo-oxidative aging properties and mechanical properties.Compared with 4020/NBR composite,the friction coefficients of MoS2/4020/NBR composite at 298 K and 398 K are reduced by about 30％and 25％,respectively,and the wear rates are reduced by 5％and 7％,respectively,which in-dicates that MoS2 can effectively improve the tribological properties of NBR composites.
nitrile butadiene rubbermolybdenum disulfidethermal and oxygen aging propertiestribological propertiesmolecular dynamics
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