试验表明，减少硫黄用量对改善NR内胎耐热老化性能的作用十分明显。
The results showed that the thermal aging properties of NR tube improved significantly by reducing the sulfur level.
进行了硫黄变量小配合试验，研究硫黄用量对NR内胎耐热老化性能的影响。
The effect of the sulfur variation on the thermal aging properties of NR tube was investigated by laboratory test.
介绍了几种评估橡胶耐热老化性能的方法以及用于表征橡胶耐热老化性能的表达式。
This paper describes several methods to assess heat-proof aging properties of rubber and several characterization expressions of rubber heat-proof aging properties.
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