ASTM_D_3484_-_06_2010.pdf

Designation:D348406(Reapproved 2010)Standard Test Methods forRubberEvaluation of Oil-Extended Solution BR(Polybutadiene Rubber)1This standard is issued under the fixed designation D3484;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.Scope1.1 These test methods cover the standard materials,testformulas,mixing procedures,and test methods for the evalu-ation and production control of oil-extended polybutadienerubber(OE-BR)polymerized in an appropriate solution.1.2 The values stated in SI units are to be regarded as thestandard.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.2.Referenced Documents2.1 ASTM Standards:2D412 Test Methods for Vulcanized Rubber and Thermoplas-tic ElastomersTensionD1646 Test Methods for RubberViscosity,Stress Relax-ation,and Pre-Vulcanization Characteristics(Mooney Vis-cometer)D2084 Test Method for Rubber PropertyVulcanizationUsing Oscillating Disk Cure MeterD3182 Practice for RubberMaterials,Equipment,and Pro-cedures for Mixing Standard Compounds and PreparingStandard Vulcanized SheetsD3896 Practice for Rubber From Synthetic SourcesSamplingD4483 Practice for Evaluating Precision for Test MethodStandards in the Rubber and Carbon Black ManufacturingIndustriesD5289 Test Method for Rubber PropertyVulcanizationUsing Rotorless Cure MetersD6204 Test Method for RubberMeasurement of Unvulca-nized Rheological Properties Using Rotorless Shear Rhe-ometers2.2 ISO Standard:ISO 2476 Rubber,Butadiene(BR)Solution PolymerizedTypesTest Recipe and Evaluation Characteristics33.Significance and Use3.1 These tests are mainly intended for referee purposes butmay also be used for quality control of rubber production.Theymay be used in research and development work for comparisonof different rubber samples in a standard formula.3.2 These test methods may also be used to obtain values forcustomer acceptance of rubber.4.Standard Test Formulas4.1 Standard FormulasSee Table 1.4.2 Formula 1 is written based on 100 parts of rubber whileFormula 2 is written on the basis of 100 parts of themasterbatch.Either formula may be used,but these will notgive the same results.NOTE1Formula 2 is specified in ISO 2476 for oil extended BR.5.Sample Preparation5.1 For test intended for referee purposes obtain and preparethe test samples in accordance with Practice D3896.6.Mixing Procedures6.1 The following four mixing test methods are offered:6.1.1 Method AInternal Mixer Procedure(6.2),6.1.2 Method BInternal Mixer/Mill Procedure(6.3),6.1.3 Method CMill Procedure(6.4),and6.1.4 Method DMiniature Internal Mixer Procedure(6.5).NOTE2It is not implied that comparable results will be obtained bythese test methods.1These test methods are under the jurisdiction of ASTM Committee D11 onRubber and are the direct responsibility of Subcommittee D11.23 on SyntheticRubbers.Current edition approved Dec.1,2010.Published February 2011.Originallyapproved in 1976.Last previous edition approved in 2006 as D3484 06.DOI:10.1520/D3484-06R10.2For 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,25 W.43rd St.,4thFloor,New York,NY 10036.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 NOTE3Since the mill handling characteristics of the solution polyb-utadiene rubbers are somewhat more difficult than that of other rubbers theuse of one of the internal mixer procedures is recommended(Method A,B,or D).The mill procedure(Method C)may be used provided a goodcarbon black dispersion is obtained.6.2 Internal Mixer Initial Mix(Methods A,B):6.2.1 For general mixing procedure refer to Practice D3182.6.2.2 Internal Mixer Initial MixSee Table 2.6.2.2.1 After mixing according to Table 2,measure andrecord the batch mass.If it differs from the theoretical value bymore than 0.5%,discard the batch.6.2.2.2 Pass the batch immediately through the standardlaboratory mill three times,with a mill opening of 6.0 mm(0.25 in.)and roll temperature of 70 6 5C(158 6 9F).6.2.2.3 Allow the batch to rest for 1 to 24 h.6.2.3 Internal Mixer Final Mix(Method A)See Table 3.6.2.3.1 After mixing according to Table 3,measure andrecord the batch mass.If it differs from the theoretical value bymore than 0.5%,discard the batch.6.2.3.2 If required,cut samples from the batch to allowte