纳米氧化锌对NR/BR胎面胶性能的影响

试验研究纳米氧化锌对不同并用比NR/BR并用胶性能的影响及其减量替代间接法氧化锌在载重轮胎胎面胶中的应用。结果表明,以纳米氧化锌等量替代间接法氧化锌用于不同并用比NR/BR并用胶中,胶料的t10和t90延长,且随着BR用量的增大,延迟时间进一步延长;硫化胶的300%定伸应力、拉断强度和回弹值增大,二者300%定伸应力和拉断强度的差值随着NR/BR并用比的变化而无明显变化,回弹值的差值随着BR用量的增大而增大;抗撕裂性能和耐疲劳性能下降;以纳米氧化锌减量25%替代间接法氧化锌用于NR/BR(并用比60/40)胎面胶中,可改善胶料的加工安全性,降低生热,提高老化后性能,成品轮胎的耐久性能有所提高。

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.