采用2种钛酸酯偶联剂用量体系(小用量和大用量)对纳米氧化锌进行表面改性,并用活化指数表征改性效果。考察了改性的纳米氧化锌在NR胶料中的力学性能随活化指数的变化规律。结果发现,在小用量时(钛酸酯质量分数1%~5%),随活化指数的提高,胶料的力学性能随之提高;在大用量时(钛酸酯质量分数在20%~60%),随活化指数的提高,胶料的力学性能随之降低。 Two kinds of titanate coupling agent dosage system (small dosage and big dosage) were used to modify the surface of nano zinc oxide, and the activation index was used to characterize the modification effect. The mechanical properties of modified nano-ZnO in NR compounds were investigated with the activation index. The results showed that the mechanical properties of the compound increased with the increase of the activation index at a small dosage (titanate mass fraction of 1% ~ 5%). At high dosage (titanate mass fraction of 20% ~ 60% %), With the activation index increased, the mechanical properties of rubber compound will be reduced.