ISO 2930:2017

Rubber, raw natural — Determination of plasticity retention index (PRI)

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.

Edition	2017
Published Date	2017
Published By	International Standardization Organisation
Page Count	9