Standard Test Method for Rubber From Natural Sources—Plasticity Retention Index (PRI)

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

10-18-2022

Publisher

American Society for Testing and Materials

1.1This test method gives an indication of the oxidation resistance of raw natural rubber at a specified temperature. This resistance is indicated by the Plasticity Retention Index (PRI), a ratio expressed as a percentage of the aged plasticity to the original plasticity determined by means of a parallel plate plastometer. A low PRI value indicates a poor resistance to oxidation.

1.2The values stated in SI units are to be regarded as the standard.

1.3This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.4This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Committee	D 11
DocumentType	Test Method
Pages	4
PublisherName	American Society for Testing and Materials
Status	Current
Supersedes	ASTM D 3194 : 2017

ASTM D 2227 : 1996 : R2020	Standard Specification for Natural Rubber (NR) Technical Grades
ASTM D 5900 : 2020	Standard Specification for Physical and Chemical Properties of Industry Reference Materials (IRM)
ASTM D 7050 : 2004 : R2019	Standard Practice for Rubber from Natural Sources—Sampling and Sorting Bales Based on Predicted Processing Properties