ICS83.060CCSG35

T/CSTM00539—2021(EN)

Liquidrandomacrylonitrile-butadienerubber無規(guī)羧基液體丙烯腈-丁二烯橡膠

(EnglishTranslation)

Issuedate:2021-08-17Implementationdate：2021-11-17

IssuedbyChineseSocietyforTesting&Materials,Zhongguancun

T/CSTM00539—2021(EN)

Foreword

CSTMFC05/TC02(ThechemicalmaterialsfieldcommitteeofChineseSocietyforTesting&Materials)isinchargeofthisEnglishtranslation.IncaseofanydoubtaboutthecontentsofEnglishtranslation,theChineseoriginalshallbeconsideredauthoritative.

ThisdocumentisdraftedinaccordancewiththerulesgivenintheGB/T1.1—2020Directivesforstandardization—Part1:Rulesforthestructureanddraftingofstandardizingdocuments.

Attentionisdrawntothepossibilitythatsomeoftheelementsofthisdocumentmaybethesubjectofpatentrights.Theissuingbodyofthisdocumentshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.

ThisdocumentwasproposedbyFieldCommitteeCSTM/FC05,Chemicalmaterials.

ThisdocumentwaspreparedbyFieldCommitteeCSTM/FC05,Chemicalmaterials,TechnicalcommitteeTC02,Rubber.

T/CSTM00539—2021(EN)

Liquidrandomacrylonitrile-butadienerubber

1Scope

Thisdocumentspecifiestherequirementsandinspectionrulesofliquidrandomacrylonitrile-butadienerubber(L-XNBR).Thetestmethods,theitemsonpackaging,marking,transportationandstoragearespecified.

ThisdocumentisapplicabletoL-XNBRsynthesizedbyfreeradicalemulsioncopolymerizationofbutadiene,acrylonitrileandacrylicacidormethacrylicacidwithsodiumdodecylsulfateasemulsifieratacertaintemperature.

2Normativereferences

Thefollowingdocumentsarereferredtointhetextinsuchawaythatsomeoralloftheircontentconstitutesrequirementsofthisdocument.Fordatedreferences,onlytheeditioncitedapplies.Forundatedreferences,thelatesteditionofthereferenceddocument(includinganyamendments)applies.

GB/T1632.1,Plastics—Determinationoftheviscosityofpolymersindilutesolutionusingcapillaryviscometers—Part1:Generalprinciples

GB/T4498.1—2013,Rubber—Determinationofash—Part1:Mufflefurnacemethod

GB/T8170—2008,Rulesofroundingofffornumericalvaluesandexpressionandjudgementoflimitingvalues

GB/T24131.1—2018,Rubber,raw—Determinationofvolatilemattercontent—Part1:Hot-millmethodandovenmethod

SH/T1149,Syntheticrubberlatex—Sampling

SH/T1157.1,Rubber,raw—Determinationofboundacrylonitrilecontentinacrylonitrile-butadienerubber(NBR)—Part1:Combustion(Dumas)method

SH/T1157.2,Rubber,raw—Determinationofboundacrylonitrilecontentinacrylonitrile-butadienerubber(NBR)—Part2:Kjeldahlmethod

3Termsanddefinitions

Notermsanddefinitionsarelistedinthisdocument.

4Requirements

4.1Appearance

L-XNBRisabrownviscousliquid.

4.2Technicalrequirements

ThetechnicalrequirementsofL-XNBRshallbeasspecifiedinTable1.

T/CSTM00539—2021(EN)

Table1Technicalrequirements

Properties

Requirements

Boundacrylonitrilecontent（m/m）/%

30.0～35.0

Boundacrylicacidcontent（m/m）/%

4.0～8.0

Volatilemattercontent（m/m）/%

≤1.00

Ashcontent（m/m）/%

≤1.00

Intrinsicviscosity(η)/（10-3m3/kg）

8.0～13.0

5Testmethod

5.1Appearance

Takeapproximately50mLoftestsampleandtransferittoacleancolorimetrictube(capacityof50mL±0.25mL).Examinethetestsamplevisuallyunderindirectlight.

5.2Boundacrylonitrilecontent

DeterminedinaccordancewithSH/T1157.1orSH/T1157.2.SH/T1157.1shallbeconsideredasamethodforarbitration.

5.3Boundacrylicacidcontent

DeterminedinaccordancewithAnnexA.

5.4Volatilemattercontent

Determinedinaccordancewith

6.3.2.2ofGB/T

24131.1—2018withthetestportiontakendirectlyfromthesample.

5.5Ashcontent

DeterminedinaccordancewithMethodAofGB/T4498.1—2013.

5.6Intrinsicviscosity

DeterminedinaccordancewithGB/T1632.1.

6Inspectionrules

6.1Routinetest

RoutinetestshallcoverallrequirementsspecifiedinClause4.

6.2Batching

T/CSTM00539—2021(EN)

Unlessotherwisespecified,abatchisdefinedastheamountofproductwhichisproducedinonereactionkettleunderthesameprocessandwiththesamerawmaterialratio.

6.3Sampling

SamplesshallbetakeninaccordancewithSH/T1149andbemixedwell.

6.4Assessmentofconformity

ThetestresultsshallberoundedoffbycomparisonmethodspecifiedinGB/T8170—2008.IfalltheresultsmeettherequirementsspecifiedinClause4,thisbatchofproductshallbeconsideredasconformity.Ifanyoftheresultsdoesnotmeettherequirements,doublesamplesshallbetakenfromthesamebatchforrecheck.Ifanyoftherecheckresultsdonotmeettherequirements,thisbatchofproductshallbeconsideredasnon-conformity.

7Packaging,marking,transportationandstorage

7.1Packaging

Allthedeliverypackagesshallbetinbarrels.Eachpackageshallbeattachedwithproductcertificate,andeachbatchshallbesuppliedwithqualityreport,includingthetestresultsofatleastalltherequirementsspecifiedin4.2.

7.2Marking

Theproductpackagingbarrelsshallbefirmlyandclearlymarkedwithatleastthefollowinginformation:

a)Manufacturer'snameortrademark;

b)Areferencetothisdocument;

c)Productname;

d)Batchnumber;

e)Netmass;

f)Productiondate;

g)Storageperiod.

7.3Transportation

Theproductshallbecarefullyhandledandbesealedduringtransportation.Itshallpreventfromsun,rainandhightemperature,andnotbeplacedupsidedown.

7.4Storage

Theproductshallbestoredinashady,coolanddrywarehouse.Keepawayfromhightemperatureandpreventfromfire,acidandalkali.Thestorageperiodis2yearsfromthedateofproduction.

T/CSTM00539—2021(EN)

AnnexA

（normative）

Determinationofacrylicacidcontent

A.1Principle

Takingphenolphthaleinastheindicator,theboundacidinthebutanonesolutionofL-XNBRisneutralizedwiththeethanolsolutionofpotassiumhydroxide,andthentitratedwiththestandardsolutionofhydrochloricacidtoobtainthecontentoftheboundacrylicacid.

A.2Reagents

A.2.1Butanone,analyticallypure.

A.2.2Potassiumhydroxideethanolsolution,0.1mol/L.6.6gpotassiumhydroxideisdissolvedin100mL90%ethanolsolutionandmixedwell.

A.2.3Hydrochloricacidstandardtitrationsolution,c(HCI)=0.1mol/L.

A.2.4Phenolphthaleinindicator,1gphenolphthaleinisdissolvedin100mL95%ethanolsolutionandmixedwell.

A.3Apparatus

A.3.1Balance,0.1mg.

A.3.2Grindingconeflask,250mL.

A.3.3Pipette,20mL.

A.3.4Burette,50mL.

A.3.5Kang'soscillator.

A.4Procedures

Takeabout0.5gofthesampleaccurateto0.1mg,andtransfertoagrindingconeflask(A.3.2).Add20mLofbutanone(A.2.1)usingapipette(A.3.3),sealthegrindingconeflaskandleaveitfor24h.Add20mLofpotassiumhydroxideethanolsolution(A.2.2)usingthepipette,add2or3dropsofphenolphthaleinindicator(A.2.4),thensealthegrindingconeflaskandoscillatefor2h.Titratethesolutionwithhydrochloricacidstandardsolution(A.2.3)untilcolorless.Totalamountofhydrochloricacidstandardsolutionconsumedshallberecorded.Thesameprocedureandreagentisusedforblanktest.

A.5Results

Themassfraction,ω,ofacrylicacid