不同牌号溶聚丁苯橡胶的实用性评价方法探讨

Discussion on Application Evaluation Method of Different Grades of Solution Polymerized Styrene Butadiene Rubber

对夏季超高性能(UHP)轮胎胎面胶分别采用等量替换法和目标值法进行配方设计,考察两种方法对溶聚丁苯橡胶(SSBR)实用性的评价效果。结果表明:将SSBR进行等量替换并通过调节树脂用量设计胎面胶的玻璃化温度在-(6±2)℃范围内的目标值法针对性地满足UHP轮胎胎面胶关键性能指标需求,可更加有效地对SSBR进行选型;只对SSBR进行等量替换的等量替换法无法客观地评价各SSBR性能的优劣,实用性较差。本研究A—D四个牌号的SSBR中C牌号和D牌号SSBR的抗湿滑性能、干地操纵稳定性和滚动阻力更具优势。

The tread compound formula of summer ultra-high performance(UHP)tire was designed by equal replacement method and target value method,respectively,and the evaluation effect of the two methods on the practicability of solution polymerized styrene butadiene rubber(SSBR)was investigated.The results showed that the target value method by firstly replacing SSBR with an equal amount and then adjusting the resin dosage to design the target value of the glass transition temperature of the tread compound within the range of-(6±2)℃to meet the key performance index requirements of UHP tire tread compound was more effective in the selection of SSBR material.The equivalent substitution method which only carried out equivalent substitution of SSBRs could not objectively evaluate the performance of each SSBR,and had little practical reference significance.Among the four grades of SSBR from A to D in this study,grade C and grade D SSBR had more advantages in wet skid resistance,dry ground handling stability and rolling resistance.