Effect of nanozinc oxide on properties of NR/BR tread

The effect of the nanozinc oxide on the properties of NR/BR blends with different blending ratios and its application in the truck tire tread at less addition level instead of indirect process zinc oxide were experimetally investigated.The results showed that in case of nanozinc oxide at equal addition level,t_(10)and t_(90)of NR/BR blends with different blending ratios extended,and the delay time extended further as the BR proportion increased;the modulus at 300%,tensile strength and resilience of the vulcanizates increased,the increase ranges of the modulus at 300% and tensile strength changed little as the blending ratio of NR/BR blend changed,but the resilience increased as the BR proportion increased;and the tear strength and fatigue resistance decreased;and in case of nanozinc oxide at 25% less addition level in NR/BR(60/40) tread,the processing safety,heat build-up and aging property of blend tread improved,and the enducance of finished tire increased.