ASTM_D_297_-_21.pdf

Designation:D29721Standard Test Methods forRubber ProductsChemical Analysis1This standard is issued under the fixed designation D297;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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 These test methods cover the qualitative and quantita-tive analysis of the composition of rubber products of the“R”family(see 3.1).Many of these test methods may be applied tothe analysis of natural and synthetic crude rubbers.1.1.1 Part A consists of general test methods for use in thedetermination of some or all of the major constituents of arubber product.1.1.2 Part B covers the determination of specific polymerspresent in a rubber product.1.1.3 The test methods appear in the following order:Part A.General Test Methods:SectionsRubber Polymer Content by the Indirect Method11 13Determinations and Report for the General Method14 and 15Density16Extract Analysis17 26Sulfur Analysis27.1 33Fillers Analysis34 40Ash Analysis41 51Part B.Determination of Rubber Polymers52 581.2 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.Specific precautionary or warning statements are given in31.4.5,31.6,37.4.2,38.4.2,45.1.3,53.2.3.5,54.4.2,54.6,56.5.3,and 57.7.3;and X1.3.3 and X2.4.1.6.1.4 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:2D792 Test Methods for Density and Specific Gravity(Rela-tive Density)of Plastics by DisplacementD982 Test Method for Organic Nitrogen in Paper andPaperboardD1416 Test Methods for Rubber from Synthetic SourcesChemical Analysis(Withdrawn 1996)3D1418 PracticeforRubberandRubberLaticesNomenclatureD1646 TestMethodsforRubberViscosity,StressRelaxation,andPre-VulcanizationCharacteristics(Mooney Viscometer)D3040 Practice for Preparing Precision Statements for Stan-dards Related to Rubber and Rubber Testing(Withdrawn1987)3D3156 Practice for RubberChromatographic Analysis ofAntidegradants(Antioxidants,Antiozonants and Stabiliz-ers)D3452 Practice for RubberIdentification by Pyrolysis-GasChromatographyD3677 Test Methods for RubberIdentification by InfraredSpectrophotometryD4483 Practice for Evaluating Precision for Test MethodStandards in the Rubber and Carbon Black ManufacturingIndustriesE11 Specification for Woven Wire Test Sieve Cloth and TestSievesE131 Terminology Relating to Molecular SpectroscopyE200 Practice for Preparation,Standardization,and Storageof Standard and Reagent Solutions for Chemical AnalysisE442 Test Method for Chlorine,Bromine,or Iodine inOrganic Compounds by Oxygen Flask Combustion(With-drawn 1996)3E443 Test Method for Sulfur in Organic Compounds byOxygen Flask Combustion(Withdrawn 1996)31These test methods are under the jurisdiction of ASTM Committee D11 onRubber and Rubber-like Materials and are the direct responsibility of SubcommitteeD11.11 on Chemical Analysis.Current edition approved Nov.1,2021.Published January 2022.Originallyapproved in 1928.Last previous edition approved in 2019 as D297 15(2019).DOI:10.1520/D0297-21.2For 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.Copyright 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 Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1?3.Terminology3.1 DefinitionsThe nomenclature and abbreviations usedfor natural and synthetic rubbers are in accordance withPractice D1418.4.Reagents4.1 Purity of ReagentsReagent grade chemicals shall beused in all tests.Unless otherwise indicated,it is intended thatall reagents shall conform to the specifications of the Commit-tee on Analytical Reagents of the Ame