高性能载重子午线轮胎天然橡胶/反式丁戊橡胶胎面胶的配方优化

Formulation Optimization of NR/TBIR Tread Compound for High Performance Truck and Bus Radial Tire

研究高性能载重子午线轮胎天然橡胶(NR)/反式丁戊橡胶(TBIR)(并用比90/10)胎面胶的配方优化。结果表明:相比炭黑补强NR/TBIR并用胶,炭黑/白炭黑(并用比40/15)补强NR/TBIR并用胶的硬度、定伸应力、拉伸强度、撕裂强度和耐磨性能略有降低,抗湿滑性能保持不变,滚动阻力降低20%,压缩温升下降17%;在该配方基础上增大10%的促进剂和硫黄用量,得到优化配方。相比炭黑补强NR胎面胶,优化配方NR/TBIR胎面胶具有优异的力学性能和动态性能,在拉伸强度和抗湿滑性能基本不变的前提下,滚动阻力降低26%,压缩温升下降20%,耐磨性能提高5%。本优化配方适用于低滚动阻力高性能载重子午线轮胎胎面胶。

The formulation optimization of natural rubber(NR)/trans-1,4-poly(butadiene-coisoprene)rubber(TBIR)(blend ratio 90/10)tread compound for high performance truck and bus radial tire was studied.The results showed that,compared with carbon black reinforced NR/TBIR vulcanizates,the hardness,modulus at a given elongation,tensile strength,tear strength and abrasion resistance of carbon black/silica(blend ratio 40/15)reinforced NR/TBIR vulcanizates decreased little,the wet-skid resistance kept unchanged,and the rolling resistance and heat built-up decreased by 20%and 17%,respectively.The formulation was further optimized by increasing the addition level of accelerator and sulfur by 10%.Compared with carbon black reinforced NR tread compound,the optimized NR/TBIR tread compound showed excellent mechanical and dynamic properties.The tensile strength and wet-skid resistance were kept unchanged,rolling resistance and heat built-up decreased by 26%and 20%,respectively,and abrasion resistance was improved by 5%.This optimized formulation was suitable for the tread compound of highperformance truck and bus radial tire with low rolling resistance.