ASTM_D_5870_-_22.pdf

Designation:D587022Standard Practice forCalculating Property Retention Index of Plastics1This standard is issued under the fixed designation D5870;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This practice covers procedures for the calculation of aproperty retention index(PRI)of thermoplastic and thermosetplastics after exposure to thermal aging,natural or artificialaccelerated weathering,or chemical exposures.1.2 This practice is not intended to establish a fixed proce-dure for conducting the exposure test,but it is intended toprovide a set of specific procedures used to calculate theretention index of a characteristic property of the material afterit has been exposed.Selection of the specific exposure testconditions depends on the material being tested and theproperty being measured.It is up to the user to determinewhich exposure test conditions are most relevant to the specificmaterial and the service condition being used.The exposuretest used must be conducted in accordance with conditionsdescribed in specific exposure standards.1.3 This practice does not describe procedures for samplingthe materials to be tested.These procedures are described in thestandards and specifications applicable to the material beingevaluated.1.4 The procedure used to calculate the PRI depends onwhether the test used to characterize the materials beingexposed is destructive or nondestructive.The PRI can be usefulin describing short-term mechanical,electrical,and otherproperties of plastics at specified temperatures after the mate-rials have been subjected to an exposure test.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.NOTE1There is no similar or equivalent ISO standard.ISO 11248 issignificantly different since it pertains only to thermosetting resins.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D543 Practices for Evaluating the Resistance of Plastics toChemical ReagentsD618 Practice for Conditioning Plastics for TestingD883 Terminology Relating to PlasticsD1435 Practice for Outdoor Weathering of PlasticsD1499 Practice for Filtered Open-Flame Carbon-Arc Expo-sures of PlasticsD1898 Practice for Sampling of Plastics(Withdrawn 1998)3D2565 Practice for Xenon-Arc Exposure of Plastics In-tended for Outdoor ApplicationsD3045 Practice for Heat Aging of Plastics Without LoadD4329 Practice for Fluorescent Ultraviolet(UV)Lamp Ap-paratus Exposure of PlasticsD4364 Practice for Performing Outdoor Accelerated Weath-ering Tests of Plastics Using Concentrated SunlightD4459 Practice for Xenon-Arc Exposure of Plastics In-tended for Indoor ApplicationsD4674 Practice forAccelerated Testing for Color Stability ofPlastics Exposed to Indoor Office EnvironmentsD6360 Practice for Enclosed Carbon-Arc Exposures of Plas-ticsG113 Terminology Relating to Natural and Artificial Weath-ering Tests of Nonmetallic Materials2.2 ISO Standards:4ISO 291 PlasticsStandard Atmospheres for Conditioningand TestingISO 877 PlasticsMethods of Exposure to Solar Radiation,Part 1:General Guidance,Part 2:Direct Weathering andExposure Behind Window Glass,and Part 3:IntensifiedWeathering Using Concentrated Solar Radiation1This practice is under the jurisdiction ofASTM Committee D20 on Plastics andis the direct responsibility of Subcommittee D20.50 on Durability of Plastics.Current edition approved July 1,2022.Published July 2022.Originally approvedin 1995.Last previous edition approved in 2016 as D5870-16.DOI:10.1520/D5870-22.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available 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 standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decisio