ASTM_D_297_-_15.pdf

Designation:D29715Standard 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 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 and health practices and determine the applica-bility of regulatory limitations prior to use.Specific precau-tionary or warning statements are given in 31.4.5,31.6,37.4.2,38.4.2,45.1.3,53.2.3.5,54.4.2,54.6,56.5.3,and 57.7.3;andX1.3.3 and X2.4.1.6.2.Referenced Documents2.1 ASTM Standards:2D982 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Method for Organic Nitrogen in Paper andPaperboardD1416 Test Methods for Rubber from Synthetic SourcesChemical Analysis(Withdrawn 1996)3D1418 PracticeforRubberandRubberLaticesNomenclatureD1646 TestMethodsforRubberViscosity,StressRelaxation,andPre-VulcanizationCharacteristics(Mooney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)33.Terminology3.1 DefinitionsThe nomenclature and abbreviations usedfor natural and synthetic rubbers are in accordance withPractice D1418.1These test methods are under the jurisdiction of ASTM Committee D11 onRubber and are the direct responsibility of Subcommittee D11.11 on ChemicalAnalysis.Current edition approved July 1,2015.Published August 2015.Originallyapproved in 1928.Last previous edition approved in 2013 as D297 13.DOI:10.1520/D0297-15.2For 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 States1 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 American Chemical Society,where such specifications are available.4Other grades may beused,provided it is first ascertained that the reagent is ofsufficiently high purity to permit its use without lessening theaccuracy of the determination.4.2 Purity of WaterUnless otherwise indicated,referencesto water shall be understood to mean distilled water or water ofequal purity.5.Concentration of Reagents5.1 Concentrated Acids and Ammonium HydroxideWhenacids and ammonium hydroxide are specified by name orchemical formula only,it is understood that concentratedreagents of the following densities or concentrations areintended:Density,Mg/m3Acetic acid,HC2H3O2(99.7%)1.05Formic acid,HCOOH1.22Hydrochloric acid,HCl1.19Hydrofluoric acid,HF(49%)1.16Nitric acid,HNO31.42Phosphoric acid,H3