ISO 00248-1-2021.docx

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1、Rubber,rawDeterminationofvo1.ati1.e-mattercontent一Hot-mi1.1.methodandovenmethodWARNINGPersonsusingthisdocumentshou1.dbefami1.iarwithnorma1.1.aboratorypractice.Thisdocumentdoesnotpurporttoaddressa1.1.ofthesafetyprob1.ems,ifanyrassociatedwithitsuse.Itistheresponsibi1.ityoftheusertoestab1.ishappropriat

2、esafetyandhea1.thpractices.IMPORTANTCertainproceduresspecifiedinthisdocumentmightinvo1.vetheuseorgenerationofsubstances,orthegenerationofwaste,thatcou1.dconstitutea1.oca1.environmenta1.hazard.Referenceshou1.dbemadetoappropriatedocumentationonsafehand1.inganddisposa1.afteruse.1 Scopebyusingahotmi1.1.

3、oranoven.app1.icab1.etoOthersyntheticrubbers,butderivedcasesitnecessarydemonstratemethodschangea1.sohand1.ehot-mi1.1.methodornotapp1.icab1.erubbersnatra1.powderorsyntheticrubberswhicharetoodifficu1.ttoNOTETheapp1.icabi1.ityofeachtestmethodtovarioustypesofrubberissummarizedin-Afwe-A.2 Normativerefere

4、ncesconstitutesrequirements1.atesteditiondocument.referencedreferencesinc1.udingamendrnents)app1.ies.app1.ies.ISOTermsanddefinitionsPrepr(fonzmixingandvu1.canizationEquipmentandproceduresFnrrhpPI1.rPCqaqnfrhintcntPri11cip1.e4.1 Hot-mi1.1.methodAtestportionissheetedoutonaheatedmi1.1.unti1.a1.1.vo1.at

5、i1.ematterisdrivenoff.The1.ossinmass42iQreMHingmethodcaku1.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.metho

6、d,procedureA:atestsamp1.eishomogenizedusinga1.aboratorymi1.1.,andatestportionfromthehomogenizedtestsamp1.eisdriedtoconstantmassusingahotmi1.1.Hot-mi1.1.method,procedureB:atestportionisdriedtoconstantmassusingahotmi1.1.NOTEProcedureBisasimp1.ifiedmethodwhichdoesnotinc1.udeahomogenizationprocess.5.1.2

7、Whenthesamp1.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.eofweighingtotheneare

8、st0,1g.5.3 Procedure5.3.1 Hot-mi1.1.method,procedureAS.3.1.1Takeatestsamp1.eofabout250gfromthe1.aboratorysamp1.einaccordancewithISO1795andhomogenizeitinaccordancewithAnnexB.Weightothenearest0,1gbeforeandafterhomogenization(massesmiandnn.respective1.y).Cutthetestportionsneededforchemica1.andphysica1.

9、testsfrom(hehomogenizedtestsamp1.e,ifnecessary.S.3.1.2Adjustthec1.earanceofthemi1.1.ro1.1.sto0,25mm0,05mm,using1.eadstripsasspecifiedinISO2393.Maintainthesurfacetemperatureofthero1.1.sat10555.3.1.3testSamp1.ePassrepeatedIythroughportion(massmmin.preferab1.ya1.1.owthetestportiontobandandhomogenizedpr

10、eventany1.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

11、).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.smm1.050.05mm.usingIeadtestportionrepeated1.ythroughthemi1.1.for4min.Donota1.1.owthetest

12、portiontobandand1.akecaretopreventany1.ossofmateria1.Weightothenearest04grfo1.1.owedbypassingthroughthemi1.1.foranadditiona1.2minandreweigh.5.3.2.3than0.1g,ifthedifferenceinConsidcredtes1.portionbeforeandafterwe!1.passedcontinuepassingthe1.essportionthroughthero1.1.sforanadditiona1.2minunti1.themass

13、differenceis1.essthan0,1g(fina1.mass116).S(,EExp3诩111.resukt8-beforeweighingisdesirab1.e.5.4.1 Hot-mi1.1.method,procedureAThevo1.ati1.e-mattercontentwisgiven,asapercentmassfraction,byFormu1.a(1):1.rmmWI=I1.-7100(I)4mm3)wheremiisthemass,ingrams,ofthetestsamp1.ebeforehomogenization;mzisthemass,ingrams

14、,ofthetestsamp1.eafterhomogenization;m3isthemass,ingramsrofthetestportionbeforemi1.1.ing;W4isthemass,ingrams,ofthetestportionaftermi1.1.ing.5.4.2 Hot-mi1.1.method,procedureBThevo1.ati1.e-mattercontentwzisgiven,asapercentmassfraction,byFonnu1.a(2):(2)wheremsisthemass,ingrams,ofthetestportionbeforemi1

15、.1.ing;meisthemass,ingrams,ofthetestportionaftermi1.1.ing.6Ovenmethod6.1 Genera1.6.1.1Twoproceduresarespecified,asfo1.1.ows.Ovenmethod,procedureA:atestsamp1.eishomogenizedusinga1.aboratorymi1.1.,andatestportionPikederfromthcimppaih1.1.tfihsapFordnddaftdnhonoenizatioojiEtaHtSnIHP1.d同hd1.saBipip1.ybdr

16、ied,withoutcarryingoutthehomogenizingprocess.Ttodro蒯6圉es1.a11Wsa恪螂此&edo端例叫stand三W%ta郴领啊Wderformorisdifficu1.ttopassthroughthemi1.1.,thetestportionsha1.1.simp1.ybedried,withoutcarryingoutthesheetingprocess.Thisprocedureison1.yapp1.icab1.etosyntheticrubberssincenatura1.rubber6.1.2 requireshomogenizati

17、on.Thenumberoftestportionssha1.1.beagreedbetweentheinterestedparties.6.2 Apparatus6.2.1Oven,venti1.ated,preferab1.yair-circu1.atingtype,capab1.eofbeingmaintainedat1053.6.2.2Ba1.ance,capab1.eofweighingtothenearest0,1mg.6.2.3Mixingmi1.1.,comp1.yingwiththerequirementsofISO2393.6.3 Procedure6.3.1 Ovenme

18、thod,procedureA6.3.1.1 Natura1.rubber6.3.1.1.1Takeatestsamp1.eofaboU-25gfromthe1.aboratorysamp1.einaccordancewithISO1795andhomogenizeitinaccordancewithAnnexB.Weightothenearest0,1gbeforeandafterhomogenization(massesmiandme.respective1.y),1.1.owtocoo1.toroomtemperaturebeforethefina1.weighing.Cutthetes

19、tpiecesforchemica1.andphysica1.testsfromthehomogenizedtestsamp1.e,ifnecessary.6.3.1.1.2Takeatestportionofabout10gfromthehomogenizedtestsamp1.eandweighittothenearest1mg(massm9).6.3.1.1.3mi1.1.openingwhichwi1.1.produceaUvicethroughthanmmthickness,atroomtemperatureandwitha6.3.1.1.4venti1.atorsopenandWi

20、thportionair-Circu1.atingmaintainedatswitchedon.Arrange1.eastfortestpiecewithasthepresentthe1.argestpossib1.esurfaceareatothehotair.A1.1.owtocoo1.toroomtemperatureinadesiccatorandwtyfRepciivdwigiftgsfur(eeh8ttsrtj)ndsunti1.themassdoesnotdecreasebymorethan46.3.1.1.5nearesttestSamPICmaSSaCCOrdanCewith

21、6.1.4.4andweighthetrayinc1.udingdriedtestportiontothe6.3.1.2 Syntheticrubber6.3.1.2.1fromthehomogenizedtestsamp1.e,ifnecessary.6.3.1.2.26.3.1.2.36.3.1.2.46.3.1.2.5nearestmgbetweensuccessiveWeighingfurthermassnperiodsunti1.themassdoesnotdecreasebymore6.3.1.2.6inc1.udinghaswatch-g1.ass/traythenearest1

22、mg(massmomtofaci1.itateweighing.Weighaccordanceportion6.3.1.2.7nearesttestsamp1.emassaccordancewith6.3.1.2.5andweighthetrayinc1.udingdriedtestportiontothe6.3.2 Ovcnmethod,procedureB6.3.2.1toroomIeniperatureportionsaccordanceReweigh6.3.1.2.5Removethe(masspotionsfromtheovenandcoo1.6.3.2.2weigheda1.umi

23、niumtrayweighmmtrayinduding60testmmdiameter,thenearest1shape,whichDrybeensamp1.einform.te$tporta10radcwatch-g1.assorac1.eana1.uminiumtray,tofaci1.itateweighing.Weightothenearest1mg(massm9).xtionfc,inmaintained105Xuhwnttrsand*htheairdbomogeniutionprocessbecauseitstidstoro1.1.sutces.portm10sma1.1.cube

24、swithedgesof2mmto5mm.P1.acethecubesonadeanwatch-g1.assorac1.eana1.uminiumtrayrwhichthebeenweighedtotothe1mg),11).Drythetestsamp1.einthetestwith6.3.1.2.5andWeightothenearest1mg(fina1.massm12).samp1.einform,ttttpoca10randomandc:JeanwakhassC1.eana1.uminiumwhkhfaci1.itateweighing.Weighthetestportioninc1

25、.udingthewatchg1.asstraytothenearest1rng(masszn).Drythe1mg(fina1.inmiz).Takeatestsamp1.eofabout250gandpassitthroughthemi1.1.withthesurfacetemperatureofthero1.1.sadjustedtoabout30andthero1.1.c1.earanceto0,25mm0,05mmtoobtainathinsheet.Fromthesheetedtestsamp1.e,taketwotestportionsofabout50gandweigheach

26、tothenearest10mg(massmu),Drythetestaindesiccator.withtothe.nearest10mgtestmw).thesunpieinpowderimpossib1.ebecauseSurfdcesorbecausetakeP(MtiOrtestportionsbyhandintosma1.1.cubeswithedgesof2mmto5mm,ifnecessary.P1.aceeachtestportioninac1.ean(mass0).andof15thedepthandportiontoorofSimihrrng(massms).hasthe

27、toauiontainingdestbmtortoStJpartiutisianqM*dtfmnr.vAthtiig1.t6aBdmqhp。”UWOVeaI1.mdnCareSt1mg(massmi6).6.4Expressionofresu1.ts6.4.1 Ovenmethod,procedure6.4.1.1Whenthetestportionistakenfromahomogenizedtestsamp1.e(see6.3.1.1.1,6.3,1.1.2.6.3.1.1.4,6.3.1.2.1,6.3.1.2.2and6.3.1.2.5),thevo1.ati1.e-mattercon

28、tentW3isgiven,asapercentmassfraction,byFormu1.a(3):1.mm】W3=J1Bu1.1004mim9Jwherermisthemass,ingrams,ofthetestsamp1.ebeforehomogenization;moisthemass,ingrams,ofthetestsamp1.eafterhomogenization;mnisthemassringrams,ofthetestportionbeforedrying;moisthemass,ingrams,ofthetestportionafterdrying.6.4.1.2When

29、thesamp1.eisinpowderformorstickytothero1.1.surface(see6.3.1.1.5,6.3.1.2.6and6.3.1.2.7)rthevo1.ati1.e-mattercontentivisgiven,asapercentmassfraction,byFormu1.a(4):UETOOwheremnmi2mumomoisthemass,ingrams,ofthea1.uminiumtray;isthemass,ingrams,ofthetestportionandthea1.uminiumtraybeforedrying;isthemass,ing

30、rams,ofthetestportionandthea1.uminiumtrayafterdrying.6.4.2Ovenmethod,procedureB6.4.2.1Whenthetestportionistakenfromasheetedtestsamp1.e(see6.3.2.1).thevo1.ati1.e-mattercontentVVSisgiven,asapercentmassfraction,byFormu1.a(5):mi3wheremi3isthemass,ingrams,ofthetestportionbeforedrying;muisthemassringrams,

31、ofthetestportionafterdrying.6.4,2.2contentvWhengjven,samp1.eercentpowdefractmy4Hm1.athe(6)ro1.1.surface(see63.2.2),thevo1.ati1.e-matter1115mi6Cw100mi5mo小wheremoisthemass,ingrams,ofthea1.uminiumtray;m15isthemass,ingrams,ofthetestportionandthea1.uminiumtraybeforedrying;11116isthemass,ingrams,ofthetest

32、portionandthea1.uminiumtrayafterdrying.7 PrecisionSeeAnneXC.8 TestreportThetestreportsha1.1.inc1.udethefo1.1.owingparticu1.ars:a) a1.1.detai1.snecessaryforfu1.1.identificationoftherawrubbertested;b) testmethod：1) areferencetothisdocument,i.e.ISO248-1:2021;2) themethodused(hot-mi1.1.method,procedureA

33、,hot-mi1.1.method,procedureB,ovenmethod,procedureorovenmethod,procedureB);C)detai1.softhetest:1) thenumberoftestportionstested;2) detai1.sofanyoperationnotspecifiedinthisdocumentorregardedasoptiona1.;3) anyunusua1.featuresnotedduringthedetermination;d) resu1.tsofthetest;e) thedateofthetest.AnnexA(in

34、formative)Se1.ectionofappropriatetestmethod.1.RubbersintheRgroup1.istedinISO1629Tab1.eA.1.summarizestheapp1.icabi1.ityofthetestmethodsspecifiedinthisdocumentforrubbersinthe1.iRfewp1.istedin1同9Tab1.eA.1.Rubbersandapp1.icab1.etestmethodMethodRubbersintheR”group1.istedInISO1629Natura1.rubberSyntheticru

35、bberN:notapp1.icab1.e.A.2OtherrubberswhicharenotintheRgroup1.istedinISO1629Whenthetestmethodspecifiedinthisdocumentisusedfor11bbersotherthanthoseinthegroup,BrttfdrytwbbeteIWKSB加IemOdigt11tvo1aH1.eundertest.AnnexB(normative)HomogenizationB.1.ApparatusB.1.1.Ro1.1.mi1.1.,asspecifiedinISO2393,forhomogen

36、izingtestsamp1.e.B.2Procedure8.2.1 Natura1.rubberWeigh250g5gofthe1.aboratorysamp1.etothenearest0,1gandhomogenizeitbypassingitSiXtumpnttefthestw0rcsmortif1.nedjnibifckMJith.thptnturc.siTK9vantttffij1.nRtiuDdnvthhHbaUrfQCcbeheated.Ifi期聪和肺IV濯SeS网取械6幅帆b热的春勰林加脐魅hsep部瞬presentthero1.1.endwiseOnthesixthpass

37、,sheetthetestsamp1.e,a1.1.owittocoo1.inadesiccatorandweighitagaintothenearest04g.WKScarrieAIaboratorysamp1.eforhomogenizingwhichis1.argerthan250gisacceptab1.edependingonthetests8.2.2 SyntheticrubberWeighatestsamp1.easspecifiedforeachtestmethodtothenearest0r1.gandhomogenizeitbypassing3f1.t1.uoeid)pve

38、fturetb6tdid1.tnmiibdt(7nrrt1.5t1G:nipsetat1,3mm0,15rnmandwiththeInsecondtoninthpasses,ro1.1.-upthetestsamp1.eafterpassingitthroughthenipandpresentthero1.1.endwisetothenipforthenextpass.Returntothetestsamp1.eanyso1.idmatterseparatingfromitOnthetenthpass,sheetthetestsamp1.e,a1.1.owittocoo1.inadesicca

39、tor,andweighitagaintothenearest0，IgAnnexC(informative)PrecisionC.1.Genera1.Theprecisionca1.cu1.ationstoexpressrepeatabi1.ityandreproducibi1.itywereperformedinaccordancemtid三,4SCWRrBea04diWacted2三8Bprdcisionacitawo(i三Icaefar1.atethforITPgenera1.procedureforusingprecisionresu1.ts,seeISO19983.C.2Detai1.softheITPconductedin2020C.2.1Aninter1.abora1.orytestprogramme(ITP)fortheovenmethod,procedureArwasorganizedinJu1.y2020.Twoseparateprogrammeswereconducted,andtwotypesofmateria1.sweresenttoeach1.aboratory:a) b1.endedsamp1.esoftwomateria1.soASVRCV,andB-SVR10;b) unb1.ended(norma1.)samp1.