BS ISO 2930:2017规定了测定生料塑性保持指数（PRI）的方法 天然橡胶。PRI是衡量天然生胶抗热氧化性的一种方法。高度的抵抗力 热氧化显示为指数的高值。PRI不是绝对值，不能给出 不同天然橡胶氧化后塑性值的绝对分类。交叉引用:ISO 2393:2008 Ed 3ISO 1795:2017ISO 23529:2016ISO 2007:2007 Ed 4ISO/TR 9272购买本文件时提供的所有当前修订版均包含在购买本文件中。

BS ISO 2930:2017 specifies a method for determining the plasticity retention index (PRI) of raw natural rubber.The PRI is a measure of the resistance of raw natural rubber to thermal oxidation. A high resistance to thermal oxidation is shown as a high value of the index. PRI is not an absolute value and cannot give an absolute classification of plasticity number of different natural rubber after oxidation.Cross References:ISO 2393:2008 Ed 3ISO 1795:2017ISO 23529:2016ISO 2007:2007 Ed 4ISO/TR 9272All current amendments available at time of purchase are included with the purchase of this document.