ASTM_D_4329_-_13.pdf

Designation:D432913Standard Practice forFluorescent Ultraviolet(UV)Lamp Apparatus Exposure ofPlastics1This standard is issued under the fixed designation D4329;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 specific procedures and test condi-tions that are applicable for fluorescent UV exposure of plasticsconducted in accordance with Practices G151 and G154.Thispractice also covers the preparation of test specimens,the testconditions best suited for plastics,and the evaluation of testresults.1.2 The values stated in SI units are to be regarded asstandard.The values given in parentheses are for informationonly.1.3 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 and health practices and determine the applica-bility of regulatory limitations prior to use.NOTE1This practice is technically similar to ISO 4892-3.2.Referenced Documents2.1 ASTM Standards:2D5870 Practice for Calculating Property Retention Index ofPlasticsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodG113 Terminology Relating to Natural and Artificial Weath-ering Tests of Nonmetallic MaterialsG141 Guide for Addressing Variability in Exposure Testingof Nonmetallic MaterialsG147 Practice for Conditioning and Handling of Nonmetal-lic Materials for Natural and Artificial Weathering TestsG151 Practice for Exposing Nonmetallic Materials inAccel-erated Test Devices that Use Laboratory Light SourcesG154 Practice for Operating Fluorescent Ultraviolet(UV)Lamp Apparatus for Exposure of Nonmetallic MaterialsG169 Guide for Application of Basic Statistical Methods toWeathering TestsG177 Tables for Reference Solar Ultraviolet Spectral Distri-butions:Hemispherical on 37 Tilted Surface2.2 ISO Standard:3ISO 4892-3 PlasticsMethods of Exposure to LaboratoryLight SourcesPart 3,Fluorescent UV Lamps2.3 SAE Standard:4SAE J2020 Accelerated Exposure of Automotive ExteriorMaterials Using a Fluorescent UV and CondensationApparatus3.Terminology3.1 The definitions in Terminology G113 are applicable tothis practice.4.Significance and Use4.1 The ability of a plastic material to resist deterioration ofits electrical,mechanical,and optical properties caused byexposure to light,heat,and water can be very significant formany applications.This practice is intended to induce propertychanges associated with end-use conditions,including theeffects of ultraviolet solar irradiance,moisture,and heat.Theexposure used in this practice is not intended to simulate thedeterioration caused by localized weather phenomena,such as,atmospheric pollution,biological attack,and saltwater expo-sure.(WarningVariation in results may be expected whenoperating conditions are varied within the accepted limits ofthis practice.Therefore,no reference to the use of this practiceshould be made unless accompanied by a report prepared inaccordance with Section 8 that describes the specific operatingconditions used.Refer to Practice G151 for detailed informa-tion on the caveats applicable to use of results obtained inaccordance with this practice.)NOTE2Additional information on sources of variability and onstrategies for addressing variability in the design,execution,and dataanalysis of laboratory-accelerated exposure tests is found in Guide G141.1This 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 15,2013.Published August 2013.Originallyapproved in 1984.Last previous edition approved in 2005 as D4329-05.DOI:10.1520/D4329-13.2For 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.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.4Available from SAE International(SAE),400 Commonwealth Dr.,Warrendale,PA 15096-0001,http:/www.sae.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 States1 4.2 Reproducibility of test results between laboratories hasbeen shown to be good when the stability of materials isevaluated in terms of performance ranking compared to othermaterials or to a control.5,6Therefore,exposure of a similarmaterial of known performance(a control)at the same time asthe test materials is strongly recommended.It is recommendedthat at least three replicates of each m