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ISO 2930:2017
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ISO 2930:2017 Rubber, raw natural - Determination of plasticity retention index (PRI)
standard by International Organization for Standardization, 08/01/2017
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Full Description
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.