中文摘要：

考察了防老剂种类及用量对丁腈橡胶疲劳过程中预制裂纹扩展的影响,并对其断面形貌进行了SEM观察。结果表明,在MB/RD、DTPD、4010和2246 4组防老剂中,防老剂2246耐疲劳性能最好,其用量为4份时效果最佳。

英文摘要：

Effects of kinds and dosage of antioxidant on propagation of the pre-made cracks on NBR sample was investigated,and the fracture surfaces were observed by using SEM.The results showed that the antioxidant 2246 had the best fatigue endurance among the antioxidant MB/RD,DTPD,4010 and 2246,and the optimum dosage was 4phr.