标准摘要
[中文适用范围]： 本文件规定了测定天然橡胶的塑性保留指数 (PRI) 的方法。PRI 是衡量天然橡胶抗热氧化性能的指标。指数值越高，抗热氧化性能越好。PRI 不是绝对值，不能对不同天然橡胶氧化后的塑性值进行绝对分类。 [外文原描述]： This document specifies a method to determine 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.
英文名称Raw, natural rubber — Determination of the plasticity retention index (PRI)