ASTM_D_1417_-_10.pdf

Designation:D141710Standard Test Methods forRubber LaticesSynthetic1This standard is issued under the fixed designation D1417;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 test procedures for syntheticrubber latices ABR,BR,CR,IIR,IR,NBR,NCR,NIR,PBR,PSBR,SBR,SCR,SIR,synthetic rubber latices having substi-tute carboxylic acid(COOH)groups on the polymer chain(X),and synthetic rubber latices that are reinforced(Y).Exceptionsto the above are noted in the individual test procedures.Thetest methods include procedures for sampling,and for deter-mining total solids,volatile unsaturates(residual styrene),pHvalue,surface tension,viscosity,coagulum,bound styrene,Mooney viscosity,mechanical stability,polystyrene reinforce-ment in contained polymer,and residual acrylonitrile content.NOTE1The nomenclature used in these test methods is in accordancewith Practice D1418.1.2 The values stated in SI units are to be regarded asstandard.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:2D1076 Specification for RubberConcentrated,AmmoniaPreserved,Creamed,and Centrifuged Natural LatexD1331 Test Methods for Surface and Interfacial Tension ofSolutions of Surface-Active AgentsD1416 Test Methods for Rubber from Synthetic SourcesChemical Analysis(Withdrawn 1996)3D1418 PracticeforRubberandRubberLaticesNomenclatureD1646 Test Methods for RubberViscosity,Stress Relax-ation,and Pre-Vulcanization Characteristics(Mooney Vis-cometer)D3182 Practice for RubberMaterials,Equipment,and Pro-cedures for Mixing Standard Compounds and PreparingStandard Vulcanized SheetsD3314 Test Method for RubberChemical Analysis forPolystyrene Blocks In SBR(Styrene-Butadiene Rubber)and Styrene-Reinforced LaticesD4483 Practice for Evaluating Precision for Test MethodStandards in the Rubber and Carbon Black ManufacturingIndustriesD6204 Test Method for RubberMeasurement of Unvulca-nized Rheological Properties Using Rotorless Shear Rhe-ometersE70 Test Method for pH of Aqueous Solutions With theGlass ElectrodeE200 Practice for Preparation,Standardization,and Storageof Standard and Reagent Solutions for Chemical Analysis3.Sampling3.1 Rubber latex tends to cream on standing.Once stratifi-cation has occurred,the latex must be thoroughly agitated toobtain a homogeneous blend as a representative sub-sample.The procedure required differs with the type of container andfacilities available.3.2 Sub-Sampling from Tank Cars:3.2.1 If stratification has occurred,take separate samplesabout 75 mm(3 in.)from the top surface and about 75 mmfrom the bottom of the tank.If results from the top and bottomsamples do not agree within 1%total solids,the contents of thecar shall be thoroughly agitated until samples obtained doagree within this tolerance.3.3 Sub-Sampling from Drums:3.3.1 BlendingThe latex shall be blended by one of thefollowing test methods:3.3.1.1 Test Method AIf the drum is fitted with a bung andcontains at least 2%air space,lay it on its side and roll backand forth briskly for not less than 10 min.Then turn the drumupside down for about 15 min and repeat the rolling operationfor an additional 10 min.If the drum contains less than 2%airspace,transfer the contents to a larger vessel and thoroughlystir,preferably by means of a perforated steel disk plunger.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 March 1,2010.Published April 2010.Originallyapproved in 1956.Last previous edition approved in 2003 as D1417 03a.DOI:10.1520/D1417-10.2For 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 Stirring for about 10 min will normally suffice.If the drum isof the open-head type,remove the end head and thoroughly stirthe contents,preferably by means of a perforated steel diskplunger.Stirring for about 10 min will normally suffice.3.3.1.2 Test Method BAgitate the contents of the drum bymeans of a suitable motor-driven stirrer for as long as isnecessary to disperse the cream.Excessive stirring and unnec-essary exposure of the latex to air must be avo