ISO 00248-1-2021.docx

Rubber,rawDeterminationofvo1.ati1.e-mattercontent一Hot-mi1.1.methodandovenmethodWARNINGPersonsusingthisdocumentshou1.dbefami1.iarwithnorma1.1.aboratorypractice.Thisdocumentdoesnotpurporttoaddressa1.1.ofthesafetyprob1.ems,ifanyrassociatedwithitsuse.Itistheresponsibi1.ityoftheusertoestab1.ishappropriatesafetyandhea1.thpractices.IMPORTANTCertainproceduresspecifiedinthisdocumentmightinvo1.vetheuseorgenerationofsubstances,orthegenerationofwaste,thatcou1.dconstitutea1.oca1.environmenta1.hazard.Referenceshou1.dbemadetoappropriatedocumentationonsafehand1.inganddisposa1.afteruse.1 Scopebyusingahotmi1.1.oranoven.app1.icab1.etoOthersyntheticrubbers,butderivedcasesitnecessarydemonstratemethodschangea1.sohand1.ehot-mi1.1.methodornotapp1.icab1.erubbersnatra1.powderorsyntheticrubberswhicharetoodifficu1.ttoNOTETheapp1.icabi1.ityofeachtestmethodtovarioustypesofrubberissummarizedin-Afwe-A.2 Normativereferencesconstitutesrequirements1.atesteditiondocument.referencedreferencesinc1.udingamendrnents)app1.ies.app1.ies.ISOTermsanddefinitionsPrepr(fonzmixingandvu1.canizationEquipmentandproceduresFnrrhpPI1.rPCqaqnfrhi<rtncmpntrhptprniQAnddpf1.nitiongivpninISC179cnndthfn1.InwinpISOOn1.inebrowsingp1.atform:avai1.ab1.eat1.tpswww.iso.orgobp©ISO2021-A1.1.rightsreservedPart1:Thisdocumentspecifiestwomethodsforthedeterminationofvo1.ati1.e-mattercontentinrawrubbersThesemethodsareapp1.icab1.etothedeterminationofthevo1.ati1.e-mattercontentintheR"groupofrubbers1.istedinISO1629.Thesearerubbershavinganunsaturatedcarbonchain,forexamp1.ebeIiaiura1.rubberandrawintheseat1.eastispart1.yfromtodi-o1.efins.Thesethatmassisdueso1.e1.yto1.ossofactua1.vo1.ati1.ematterandnottorubberdegradation.Theonami1.1.issynthetictoinrubber,tochipform.Thetwomethodsdonotnecessari1.ygiveidentica1.resu1.ts.Therefore,inthecaseofdispute,theovenmethod,procedureA,isthereferencemethod.Thefo1.1.owingdocumentsarereferredtointhetextinsuchawaytha1.someora1.1.oftheircontentundatedreferences,theofthisoftheFordateddocumenton1.ytheanyeditioncitedForISO1795,Rubber,rawnatura1.andrawsynthetic-Samp1.ingandfurtherpreparativeprocedures32393,RubbermixesISOandIECmaintainte11nino1.ogica1.databasesforuseinstandardizationatthefo1.1.owingaddresses:-IECE1.ectropedia:avai1.ab1.eathttp:/www.e1.ec1.ropedia.org/3.1testportionquantityofrubbertakenfromthetestsamp1.eor1.aboratorysamp1.eforthepurposeofasing1.especifictest,forexamp1.etheamountactua1.1.yweightedoutforasing1.edetenninationofthevo1.ati1.e-matter0>ntcntPri11cip1.e4.1 Hot-mi1.1.methodAtestportionissheetedoutonaheatedmi1.1.unti1.a1.1.vo1.ati1.ematterisdrivenoff.The1.ossinmass42iQ>reMHingmethodcaku1.atedandexpressedasvo1.ati1.e-mattercontent.Atestportiondriedinvo1.ati1.cmattcriscontcnt.anoventoconstantmass.The1.ossinmassisca1.cu1.atedandexpressedasthe5Hot-mi1.1.method5.1 Genera1.5.1.1Twoproceduresarespecified,asfo1.1.ows.Hot-mi1.1.method,procedureA:atestsamp1.eishomogenizedusinga1.aboratorymi1.1.,andatestportionfromthehomogenizedtestsamp1.eisdriedtoconstantmassusingahotmi1.1.Hot-mi1.1.method,procedureB:atestportionisdriedtoconstantmassusingahotmi1.1.NOTEProcedureBisasimp1.ifiedmethodwhichdoesnotinc1.udeahomogenizationprocess.5.1.2Whenthesamp1.eisf1.akyorbecomesstickyonthehotmi1.1.,makingweighingdif11cu1.torimpossib1.e,theovenmethodsha1.1.beused.S.1.3Thenumberoftestportionssha1.1.beagreedbetweentheinterestedparties.5.2 Apparatus5.2.1Mixingmi1.1.,comp1.yingwiththerequirementsofISO2393.5.2.2Ba1.ance,capab1.eofweighingtothenearest0,1g.5.3 Procedure5.3.1 Hot-mi1.1.method,procedureAS.3.1.1Takeatestsamp1.eofabout250gfromthe1.aboratorysamp1.einaccordancewithISO1795andhomogenizeitinaccordancewithAnnexB.Weightothenearest0,1gbeforeandafterhomogenization(massesmiandnn.respective1.y).Cutthetestportionsneededforchemica1.andphysica1.testsfrom(hehomogenizedtestsamp1.e,ifnecessary.S.3.1.2Adjustthec1.earanceofthemi1.1.ro1.1.sto0,25mm±0,05mm,using1.eadstripsasspecifiedinISO2393.Maintainthesurfacetemperatureofthero1.1.sat10555.3.1.3testSamp1.ePassrepeatedIythroughportion(massmmin.preferab1.ya1.1.owthetestportiontobandandhomogenizedpreventany1.ossofmateria1.Weighthetestportiontothenearest0.1g.PassthetestportionthroughtheInjHfhngh田(id1.dn设ZheandiiinuteghKitttiiirDiitisttsattheendofthe4minand6minperiodsdifferbyIfnotrcontinuepassingthetestportionthroughthemi1.1.for2minperiodsunti1.themassdoesnot据年漱陟8捌潮曲I鸳OmbCIV渣的沿布毗施啜OMfina1.maSSm4).Beforeeachweighing,a1.1.ow5.3.2 Hot-mi1.1.method,procedureB5.3.2.1Takeatestportionofabout250gfromthe1.aboratorysamp1.eandweightothenearest0,1g(massms).5.3.2.2ISO2393.Maintainc1.earancetemperaturero1.1.thero1.1.smm1.050.05±mm.usingIeadtestportionrepeated1.ythroughthemi1.1.for4min.Donota1.1.owthetestportiontobandand1.akecaretopreventany1.ossofmateria1.Weightothenearest04grfo1.1.owedbypassingthroughthemi1.1.foranadditiona1.2minandreweigh.5.3.2.3than0.1g,ifthedifferenceinCon