碳纳米管对炭黑/丁苯橡胶复合材料耐疲劳性能的影响

Effect of Carbon Nanotube on Fatigue Resistance of Carbon Black/SBR Composite

分别以1,2,3和4份碳纳米管等量替代炭黑填充制备丁苯橡胶（SBR）复合材料,并对其宽应变内（30％～100％）的耐疲劳性能进行研究.结果表明：随着碳纳米管用量的增大,在相同应变下,SBR复合材料的疲劳寿命缩短,裂纹增长速率增大;复合材料的疲劳裂纹增长速率对撕裂能的敏感度降低,当撕裂能较大时,碳纳米管用量对裂纹增长速率影响不大.

In this study, carbon nanotube was applied to replace equal weight of carbon black in the SBR composites and the fatigue resistance of the composites in a wide strain range （30 % ~100%） was investigated. The addition levels of carbon nanotube were 1,2,3 and 4 phr, respectively. The results showed that,under the same strain level,when the addition level of carbon nanotube increased, the fatigue life of the composites was reduced,the fatigue crack growth rate increased,and the sensitivity of energy rate. tearing energy on fatigue crack growth rate of the composites decreased. When the tearing was high,the addition level of carbon nanotube had a small effect on the fatigue crack growth