ASTM_D_3848_-_03_2022.pdf

Designation:D384803(Reapproved 2022)Standard Test Methods forRubberEvaluation of NBR(Acrylonitrile-ButadieneCopolymers)Mixed With Carbon Black1This standard is issued under the fixed designation D3848;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 specify the standard materials,testformula,mixing procedures,and test methods for the evalua-tion of acrylonitrile-butadiene rubber(NBR)mixed with car-bon black.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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.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:2D412 Test Methods for Vulcanized Rubber and Thermoplas-tic ElastomersTensionD1646 TestMethodsforRubberViscosity,StressRelaxation,andPre-VulcanizationCharacteristics(Mooney Viscometer)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-ometers3.Significance and Use3.1 These test methods are mainly intended for refereepurposes but may be used for quality control of rubberproduction.They may also be used in research and develop-ment work and for comparison of different samples in astandard test formula.3.2 These test methods may also be used to obtain values forcustomer acceptance of rubber.4.Standard Test Formula4.1 Standard Formula:IRM/SRMSRMQuantity,PartsMaterialNo.By MassMasterbatch.100.00+XAZinc oxideB3.00Sulfur,coatedC.1.50Stearic acidB1.00TBBSDB0.70+XTotal mass106.20+XBatch factorsMillEMiniature internal mixerFAX=parts carbon black per 100 parts base polymer.BUse current IRM/SRM.CThe use of 2%MgCO3coated sulfur is recommended.Standard 2%MgCO3coated sulfur Lot No.M266573-P is available from C.P.Hall Co.,4460 HudsonDrive,Stow,OH 44224.DN-tert-butyl-2-benzothiazolesulfenamide.EFor mill mixing,a batch factor should be selected to the nearest 0.5 to give aslarge as total mass as possible that will not exceed 525.0 g.Calculate all parts tothe nearest 0.01 part.Weigh the masterbatch to the nearest 1 g,the sulfur and theaccelerator to the nearest 0.02 g,and all the other compounding materials to thenearest 0.1 g.1These test methods are under the jurisdiction of ASTM Committee D11 onRubber and Rubber-like Materials and are the direct responsibility of SubcommitteeD11.23 on Synthetic Rubbers.Current edition approved Oct.1,2022.Published October 2022.Originallyapproved in 1980.Last previous edition approved in 2018 as D3848 03(2018).DOI:10.1520/D3848-03R22.2For 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.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.1FFor MIM mix,select a batch factor to give a batch that will fill the mixing chambervolume to 75%capacity.Calculate all parts to the nearest 0.1 g,the compoundingmaterial blend to the nearest 0.01 g,and the individual compounding materials,ifused,to the nearest 0.001 g.For the MIM procedure,it is recommended that a blend of compoundingmaterials be prepared to improve accuracy in the weighing of the materials.Thecompound material blend is prepared by blending a proportional mass of eachmaterial in a biconical or a vee blender.A mortar and pestle may be used forblending sm