碳纳米管对炭黑/丁苯橡胶复合材料耐疲劳性能的影响

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 sensiti-vity of tearing energy on fatigue crack growth rate of the composites decreased.When the tearing energy was high，the addition level of carbon nanotube had a small effect on the fatigue crack growth rate