采用熔融共混方法制备苯乙烯-马来酸酐共聚物(SMA)增容的PA 6/ABS共混物,考察温度和测试速率对PA 6/ABS共混物韧性的影响。结果表明:共混物的缺口冲击强度随着温度升高而提高,达到脆-韧转变温度后冲击强度急剧增加,超过脆-韧转变温度后,共混物的冲击强度基本不变;随着夹头移动速率的增加,PA 6/ABS共混物的裂纹引发功先减少后增加,裂纹扩展功随夹头移动速率增加而先增加后减少。 The compatibilized PA 6 / ABS blends of styrene-maleic anhydride copolymer (SMA) were prepared by melt blending. The effects of temperature and testing speed on the toughness of PA 6 / ABS blends were investigated. The results show that the notched impact strength of the blends increases with the increase of temperature and the impact strength increases sharply after reaching the brittle-ductile transition temperature. The impact strength of the blends remains unchanged after the brittle-ductile transition temperature is exceeded. When the moving speed of chuck increases, the crack initiation work of PA 6 / ABS blends first decreases and then increases. The crack extension work first increases and then decreases with the chuck moving speed increasing.