ASTM_D_3192_-_09_2019.pdf

Designation:D319209(Reapproved 2019)Standard Test Methods forCarbon Black Evaluation in NR(Natural Rubber)1This standard is issued under the fixed designation D3192;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,testformulation,mixing procedure,and test methods for theevaluation and production control of carbon blacks in naturalrubber(NR).1.2 The values stated in SI units are to be regarded as thestandard.The values in parentheses are for information only.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 ElastomersTensionD1799 Practice for Carbon BlackSampling PackagedShipmentsD1900 Practice for Carbon BlackSampling Bulk Ship-mentsD2084 Test Method for Rubber PropertyVulcanizationUsing Oscillating Disk Cure MeterD3182 Practice for RubberMaterials,Equipment,and Pro-cedures for Mixing Standard Compounds and PreparingStandard Vulcanized SheetsD4483 Practice for Evaluating Precision for Test MethodStandards in the Rubber and Carbon Black ManufacturingIndustries3.Significance and Use3.1 The major portion of carbon black consumed by therubber industry is used to improve the physical properties,lifeexpectancy,and utility of rubber products.These test methodsprovide a natural rubber formulation and directions for evalu-ating carbon black intended for use in rubber products.3.2 These test methods may be used to characterize carbonblack in terms of specific properties of the standard compound.These test methods are useful for the quality assurance ofcarbon black production.They may also be used for thepreparation of reference compounds,to confirm the day-to-dayreliability of testing operations used in the rubber industry,forthe evaluation of experimental compounds,and quality controlof production compounds.4.Standard Test Formula4.1 Standard Formula:MaterialIRMANo.Quantity,partsby massNatural rubberB.100.00Stearic acid213.00Zinc oxide915.00Benzothiazyl disulfide20.60Sulfur312.50Carbon blackC.50.00Total161.10Batch factor:DTest Method AMill4.00Test Method BInternal Mixer6.00Test Method CMiniature Internal0.40Mixer_AIRM 91 is available from R.E.Carroll,Inc.,1570 North Olden Ave.,Trenton,NJ08638;(800)2579365.IRM 2,IRM 21,and IRM 31 are available from AkronRubber Development Lab,2887 Gilchrist Road,Akron,OH 44305;(330)7946600.BSMR L and STR L have been found to give satisfactory performance.Othersources of rubber may give satisfactory results but have not been investigated bySubcommittee D24.71.Other sources of rubber should be checked to ensure thatresults equivalent to SMR L are attained before using in this test method.1These test methods are under the jurisdiction of ASTM Committee D24 onCarbon Black and are the direct responsibility of Subcommittee D24.71 on CarbonBlack Testing in Rubber.Current edition approved May 1,2019.Published June 2019.Originallyapproved in 1973.Last previous edition approved in 2014 as D3192 09(2014).DOI:10.1520/D3192-09R19.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandardsvolume 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.1 CUse 75.00 parts by mass of carbon blacks in the N-800 and N-900 series.DWeigh rubber and carbon black to the nearest 1 g,sulfur and accelerator to thenearest 0.02 g,and all other compounding materials to the nearest 0.1 g.5.Sampling and Sample Preparation5.1 Samples shall be taken in accordance with PracticeD1799 or Practice D1900.5.2 The carbon black shall be conditioned before weighingand mixing by heating for 1 h in an oven set at 125 6 1C.Theblack shall be placed in an o