ASTM D5870-11

This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D5870–95 (Reapproved 2003) Designation: D5870 – 11
Standard Practice for
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Calculating Property Retention Index of Plastics
This standard is issued under the fixed designation D5870; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This practice covers procedures for the calculation of a property retention index (PRI) of thermoplastic and thermoset
plastics after exposure to thermal aging, natural or artificial accelerated weathering, or chemical exposures.
1.2 This practice is not intended to establish a fixed procedure for conducting the exposure test, but it is intended to provide
a set of specific procedures used to calculate the retention index of a characteristic property of the material after it has been
exposed. Selection of the specific exposure test conditions depends on the material being tested and the property being measured.
It is up to the user to determine which exposure test conditions are most relevant to the specific material and the service condition
being used. The exposure test used must be conducted in accordance with conditions described in specific exposure standards.
1.3 This practice does not describe procedures for sampling the materials to be tested. These procedures are described in the
standards and specifications applicable to the material being evaluated.
1.4 The procedure used to calculate the PRI depends on whether the test used to characterize the materials being exposed is
destructiveornondestructive.ThePRIcanbeusefulindescribingshort-termmechanical,electrical,andotherpropertiesofplastics
at specified temperatures after the materials have been subjected to an exposure test.
1.5 This 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 and health practices and determine the applicability of regulatory
limitations prior to use.
NOTE 1—There is no similar or equivalent ISO standard. ISO DIS 11248 is significantly different since it pertains only to thermosetting resins.
2. Referenced Documents
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2.1 ASTM Standards:
D543 Practices for Evaluating the Resistance of Plastics to Chemical Reagents
D618 Practice for Conditioning Plastics for Testing
D883 Terminology Relating to Plastics
D1435 Practice for Outdoor Weathering of Plastics
F1499 Specification for Coextruded Composite Drain, Waste, and Vent Pipe (DWV)
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D1898 Practice for Sampling of Plastics
D2565 Practice for Xenon-Arc Exposure of Plastics Intended for Outdoor Applications
D3045 Practice for Heat Aging of Plastics Without Load
D4329 Practice for Fluorescent UV Exposure of Plastics
D4364 Practice for Performing Outdoor Accelerated Weathering Tests of Plastics Using Concentrated Sunlight
D4459 Practice for Xenon-Arc Exposure of Plastics Intended for Indoor Applications
D4674 Practice for Accelerated Testing for Color Stability of Plastics Exposed to Indoor Office Environments
D6360 Practice for Enclosed Carbon-Arc Exposures of Plastics
G113 Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials
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2.2 ISO Standards:
ISO 291 Plastics—Standard Atmospheres for Conditioning and Testing
ISO 877 Plastics—Methods of Exposure to Direct Weathering, to Weathering Using Glass Filtered Daylight, and to Intensified
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This practice is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.50 on Durability of Plastics.
Current edition approved May 10, 2003. Published June 2003. Originally approved in 1995. Last previous edition approved in 1995 as D5870-95. DOI:
10.1520/D5870-95R03.
Current edition approved Feb. 1, 2011. Published March 2011. Originally approved in 1995. Last previous edition approved in 2003 as D5870 - 95(2003). DOI:
10.1520/D5870-11.
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For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
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Withdrawn.
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Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
*A Summary of Changes section appears at the end of this standard.
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