MS_1359_Part7_1995

MALAYSIANMS 1359 : PART 7 : 1995ICS : 83.040.10

STANDARDLicensed to BESTCOM / Downloaded on : 15-Aug-2017 10:34:03 AM / Single user license only, copying and networking prohibitedTEST METHOD FOR TECHNICALLY SPECIFIED RAW NATURAL RUBBERPART 7 : DETERMINATION OF MOONEYACCELERATED STORAGE - HARDENINGTEST (MASHT)

STANDARDS & INDUSTRIAL RESEARCH INSTITUTE OF MALAYSIA

© Copyright

1

©SIRIM.NopartofthispublicationmaybephotocopiedorotherwisereproducedwithoutthepriorpermissioninwritingofSIRIMLicensed to BESTCOM / Downloaded on : 15-Aug-2017 10:34:03 AM / Single user license only, copying and networking prohibitedMS1359:PART7:1995ThisMalaysianStandardwhichhadbeenapprovedbytheFoodandAgriculturalIndustryStandardsCommitteeandendorsedbytheBoardoftheStandardsandIndustrialResearchInstituteofMalaysia(SIRIM)waspublishedundertheauthorityoftheSIRIMBoardinDecember,1995.SIRIMwishestodrawattentiontothefactthatthisMalaysianStandarddoesnotpurporttoincludeallthenecessaryprovisionsofacontract.TheMalaysianStandardsaresubjecttoperiodicalreviewtokeepabreastofprogressintheindustriesconcerned.SuggestionsforimprovementswillberecordedandinduecoursebroughttothenoticeoftheCommitteeschargedwiththerevisionofthestandardstowhichtheyrefer.detibiThefollowingreferencesrelatetotheworkonthisstandard:horp Committeereference:SIRIM481/2/6gnirkDraftforcomment:D362(ISCA)owten dna gniypoc ,ylno esnecil reus elgniAmendmentsissuedsincepublicationS / MA 30:Ainci.No.DateofissueTextaffected43:01 7102-guA-51 : no dedaolnwoD / MOCT(i)SEB ot desneciLMS1359PART7:1996CONTENTSPage1234567Figure1CommitteerepresentationForewordScopeDefinitionsPrincipleApparatusProcedureExpressionofresultsTestreportAll-glasswatertrapunitforMASHT(U)(iii)(iv)111Ia234Licensed to BESTCOM / Downloaded on : 15-Aug-2017 10:34:03 AM / Single user license only, copying and networking prohibitedMS1359:PART7:1995CommitteerepresentationTheFoodandAgriculturalIndustryStandardsCommitteeunderwhosesupervisionthisMalaysianStandardwasprepared,comprisesrepresentativesfromthefollowingGovernmentMinistries,commerceandmanufacturerassociations,scientificandprofessionalbodies.DepartmentofAgricultureFederalAgriculturalMarketingAuthorityFederationofMalaysianConsumersAssociationsFederationofMalaysianManufacturersMalaysianAgriculturalResearchandDevelopmentInstituteMinistryofAgricultureMalaysianOilPalmGrowerscouncilRubberResearchInstituteofMalaysiaLicensed to BESTCOM / Downloaded on : 15-Aug-2017 10:34:03 AM / Single user license only, copying and networking prohibitedUniversitiPertanianMalaysiaTheWorkingGrouponRawRubberandLatexwhichpreparedthisMalaysianStandardconsistsofthefollowingrepresentatives:Encikc.F.Robert(Chairman)Dr.LokeKumMunEncikNgVuTongPuanSunariTukimanDr.KuAbdulRahmanKuIsmailEncikLeeSengChaiEncikTanKokLeongEncikTanLaiHockEncikP.Selvaraj/EncikSathianathanMenonEncikNgMarChaiPuanKhatijah1-tashim(Secretary)MalaysianRubberProducersCouncilRubberResearchInstituteofMalaysiaRubberResearchInstituteofMalaysiaRubberResearchlinstituteofMalaysiaMalaysianRubberDevelopmentCorps.Bhd.(MARDEC)MalaysianRubberProducerscouncilGuthrieRubberProcessingSdn.BhdFederalLandDevelopmentAuthoritySocfinCo.BhdMECHCHEMStandardsandIndustrialResearchInstituteofMalaysia(Hi)MS1359:PART7:1996FOREWORDThisMalaysianStandardwaspreparedbytheWorkingGrouponRawRubberandLatexundertheauthorityoftheFoodandAgriculturalIndustryStandardsCommittee.Inthepreparationofthisstandardtestmethods,thefollowingpublicationwasreferredto:(i)RRIMSMRBulletinNo.7RevisedEdition1992,TestMethodsForStandardMalaysianRubbers.Dueconsiderationshavealsobeengiventolocalconditions/practiceandmarketrequirements.(iv)Licensed to BESTCOM / Downloaded on : 15-Aug-2017 10:34:03 AM / Single user license only, copying and networking prohibiteddetibihorp gnirkowten dna gniypoc ,ylno esnecil reus elgniS / MA 30:43:01 7102-guA-51 : no dedaolnwoD / MOCTSEB ot desneciLMS1359:PART7:1995TESTMETHODSFORTECHNICALLYSPECIFIEDRAWNATURALRUBBERPART7:DETERMINATIONOFMOONEYACCELERATEDSTORAGE-HARDENINGTEST(MASHT)ScopeThisMalaysianStandardspecifiesamethodofmeasuringthestoragehardeningofrawnaturalrubberusingtheMooneyshearingdiscviscometer.2.DefinitionsPiece:Arubbertakenfromabatetorepresentabalesample.Testportionortestpiece:Aportioncutfromthehomogenisedpiecefortesting.Storagehardening:Anirreversiblereactionwhichcausestherubbertohardenonstorage.AcceleratedstorageAprocessofacceleratingthestoragehardeninginrubberbyhardeningtest(ASHT):apredeterminedcombinationofheatinganddrying.Viscosity-stabilisedRubberswhichhavebeenchemicallytreatedtogiveminimalrubber:storagehardening.3.PrincipleMooneyASHIinvolvesthemeasurementoftheMooneyviscosityofrubbertestportionsbeforeandafteracertainperiodofstorageunderconditionswhichacceleratetheachievedbystoringrubbertestportionsoverphosphoruspentoxideinavacuumatstorage-hardeningreaction.Inthistest,acceleratedstorage-hardeningis60±acceleratedstorage-hardening.1°Cfor48±0.1h.Theresultantincreaseinviscosity(Md)representsthe4.Apparatus(a)Mooneyviscometer.(b)LaboratoryaccommodateoneormorevacuumdesiccatorofBLWApattern.Itshouldbeoven.Ageneralpurposetypewithfanlargeenoughtosuchthattemperaturefluctuationis±1°Cthroughouttheworkingspace.1MS1359:PART7:1995(C)Highvacuumpump.(d)DesiccatorBLWApattern,designedforvacuumusewithcover,collarstopcock,plateandglasscontainer.(e)Thermometer0°C-110°C.(f)Thermostatedflask.(g)Al!glasswatertrapunitasshowninFigure1.(h)Spirit,industrialmethylated.(j)Phosphoruspentoxide(phosphoricoxide),laboratoryreagentgrade.(k)Highvacuumgrease.(m)Dryiceoricesaturatedwithcommonsalt(sodiumchloride).(n)Spatula,resistanttophosphoruspentoxidecorrosion.5.ProcedureAtestportionweighingabout25gofthehomogenisedpieceispreparedasfortheMooneyviscositytest.Thetestportionshouldnotbefolded.Ensurethatthedesiccatoriscleananddry.container.Transferapproximately180gofP205intotheglassporcelainplate.Ptacethetestportions(twelvetofifteenpieceperdesiccator)ontheApplygreasetothecoverandstopcock.Checktoensurethatthethermosflaskandadddryicewhichhasbeensplitintosmallbits(seeFigure1).greasedoesnotblocktheentryofairintothedesiccator.PourmethylatedspiritintoStoptheadditionofdryiceafterthespiritissaturatedwithit.sufficientlycooltheairwhichisdrawnthroughtheglasstubingsothatnomoisturewillThismixturewillenterthevacuumpumptorenderitineffective.Attachoneendofasuitablerubbertubetothestopcockofthedesiccatorandtheotherendtoavacuumpump.Startthepumpandleaveittorunforabout1h.Thenclosethestopcock.at60Removetherubbertube.Placethedesiccatorinanoven±1°Cfor48±0.lh.Removethedesiccatorfromtheoven.Slowlyopenthestopcockofthedesiccatortoallowtheentryofair.desiccatorandleavethemtocool.TesttherubberportionsforMooneyviscosity,Removethetestportionsfromtheafteratleast4hbutnotexceeding24hofcooling.6.ExpressionofresultsTheacceleratedstoragehardeningshallbeexpressedasfollows:AV=VH-Vo2Licensed to BESTCOM / Downloaded on : 15-Aug-2017 10:34:03 AM / Single user license only, copying and networking prohibitedMS1359:PART7:1995where,7.VHistheMooneyviscosityofthehardenedtestportion;V0istheMooneyviscosityofthenon-storagehardenedtestportion;IsVisthedifferenceinMooneyunitsbetweenVHandV0.TestreportThetestreportshallincludethefollowingparticulars:(i)referencetothisMalaysianStandard;(ii)identificationofthetestsample;(iii)testresultasdescribedinClause6;(iv)anyunusualfeature(s)notedduringthedetermination;(v)dateofthetest;(vi)anyoperationnotincludedintheMalaysianStandardorintheMalaysianStandardtowhichreferenceismadeorregardedasoptional.3Licensed to BESTCOM / Downloaded on : 15-Aug-2017 10:34:03 AM / Single user license only, copying and networking prohibiteddetibihorp gnirkowten dna gniypoc ,ylno esnecil reus elgnaiS / MA 30:43:01 7102-guA-51 : no dedaolnwoD / MOCTSEB ot denseciL120mmB19/26stopper—I--300mm-i1lOOmmSocketforB19/26stopperB10/26socket(tosupply2pieces)E29,StopcockVacuumpump14/23socketconcglossOmnMtubingglass40mm0/330mminnervesselDryice/spiritmixtureThermostattedIloskDesiccatorFigure1.All-glasswatertrapunitforMASHICA-a(901(0-U—I-4(0(0C,’MS ISO 10202-6 : 1996

TANDA-TANDA STANDARD SIRIM

Tanda-tanda Standard SIRIM seperti yang tertera di bawah adalah tanda-tanda pengesahandagangan berdaftar. Tanda-tanda ini hanya boleh digunakan oleh mereka yang dilesenkandi bawah skim tanda pengesahan yang dijalankan oleh SIRIM mengikut nombor StandardMalaysia yang berkaitan. Kewujudan tanda-tanda ini pada atau berkaitan dengan sesuatubarangan adalah sebagai jaminan bahawa barangabn tersebut telah dikeluarkan melaluisatu sistem penyeliaan, kawalan dan ujian, yang dijalankan semasa pengeluaran. Initermasuk pemeriksaan berkala kerja-kerja pengeluaran menurut skim tanda pengesahanSIRIM yang dibentuk untuk menentukan bahawa barangan tersebut menepati StandardMalaysia.

Keterangan-keterangan lanjut mengenai syarat-syarat lesen boleh didapati dari:

Ketua Pengarah

Institut Standard dan Penyelidikan Perindustrian MalaysiaPersiaran Dato’ Menteri, Seksyen 2, Peti Surat 7035

40911 Shah AlamSelangor Darul Ehsan

Licensed to BESTCOM / Downloaded on : 15-Aug-2017 10:34:03 AM / Single user license only, copying and networking prohibitedSIRIM STANDARD MARKS

The SIRIM standard marks shown above are registered certification trade marks. They maybe used only by those licensed under the certification marking scheme operated by SIRIMand in conjunction with relevant Malaysian Standard number. The presence of these Markson or relation to a product is assurance that the goods have been produced under a systemof supervision, control and testing, operated during production, and including periodicalinspection of the producer’s works in accordance with the certification marking scheme ofSIRIM designed to ensure compliance with a Malaysian Standard.Further particulars of the terms of license may be obtained from:

Director-General

Standards and Industrial Research Institute of MalaysiaPersiaran Dato’ Menteri, Section 2. P.O.Box 7035

40911 Shah AlamSelangor Darul Ehsan

5

MS ISO 10202-6 : 1996

INSTITUT STANDARD DAN PENYELIDIKAN PERINDUSTRIAN MALAYSIA

Institut Standard dan Penyelidikan Perindustrian Malaysia (SIRIM) telah ditubuhkan hasil dari cantuman InstitutPiawaian Malaysia (SIM) dengan Institut Negara bagi Penyelidikan Sains dan Perusahaan (NISIR) di bawahUndang-Undang Malaysia Akta 157 pada 16hb. September 1975:Akta Institut Standard dan PenyelidikanPerindustrian Malaysia (Perbadanan) 1975. Institut ini diletakhak dengan kuasa untuk memamju danmenjalankan penyelidikan perindustrian dan untuk menyedia dan memajukan standard-standard bagi barangan-barangan, proses-proses, amalan-amalan dan perkhidmatan-perkhidmatan; dan bagi mengadakan peruntukanbagi perkara-perkara yang bersampingan atau berkaitan dengan maksud-maksud itu.

Satu daripada tugas-tugas Institut ini adalah menyediakan Standard-Standard Malaysia dalam bentukpenentuan-penentuan bagi bahan-bahan, keluaran-keluaran, kaedah-kaedah ujian, kod-kod amalan yangsempurna dan selamat, sistem penamaan dan lain-lain. Standard-Standard Malaysia disediakan olehjawatankuasa-jawatankuasa perwakilan yang menyelaras keupayaan pengilang dan kecekapan pengeluarandengan kehendak-kehendak yang munasabah dari pengguna. Ia menuju ke arah mencapai kesesuaian bagimaksud, memudahkan pengeluaran dan pengedaran, kebolehsalingtukaran gantian dan pelbagai pilihan yangmencukupi tanpa pembaziran.

Standard-Standard Malaysia disediakan hanya setelah penyiasatan yang lengkap menujukkan bahawa sesuatuprojek itu disahkan sebagai yang dikehendaki dan berpadanan dengan usaha yang terlibat. Hasil ini berasaskanpersetujuan sukarela dan memberi pertimbangan kepada kepentingan pengeluar dan pengguna. Standard-Standard Malaysia adalah sukarela kecuali is dimestikan oleh badan-badan berkuasa melalui peraturan-peraturan, undang-undang persekutuan dan tempatan atau cara-cara lain yang sepertinya.

Institut ini beroperasi semata-mata berasaskan tanpa keuntungan. Ia adalah satu badan yang menerima bantuankewangan dari Kerajaan, kumpulan wang dari bayaran keahlian, hasil dari jualan Standard-Standard danterbitan-terbitan lain, bayaran-bayaran ujian dan bayaran-bayaran lesen untuk mengguna Tanda PengesahanSIRIM dan kegiatan-kegiatan lain yang berhubung dengan Penstandardan, Penyelidikan Perindustrian danKhidmat Perunding.

Licensed to BESTCOM / Downloaded on : 15-Aug-2017 10:34:03 AM / Single user license only, copying and networking prohibitedSTANDARDS AND INDUSTRIAL RESEARCH INSTITUTE OF MALAYSIA

The Standard and Industrial research Institute of Malaysia (SIRIM) is established with the merger of theStandards Institution of Malaysia (SIM) and the National Institute for Scientific and Industrial Research (NISIR)under the Laws of Malaysia Act 157 on 16th. September 1975: Standards and Industrial Research Institute ofMalaysia (Incorporation) Act 1975. The Institute is vested with the power to provide for the promotion andundertaking of industrial research and for the preparation and promotion of standards for commodities,processes, practices and services; and to provide for matters incidental to or connected with those purposes.One of the functions of the Institute is to prepare Malaysian Standards in the form of specifications for materialsand products, methods of testing, codes of sound and safe practice, nomenclature, etc. Malaysian Standards areprepared by representative committees which co-ordinate manufacturing capacity and production efficiency withthe user’s reasonable needs. They seek to achieve fitness for purpose, simplified production and distributionreplacement interchangeability, and adequate variety of choice without wasteful diversify.

Malaysian Standards are prepared only after a full enquiry has shown that the project is endorsed as a desirableone and worth the effort involved. The work is based on voluntary agreement, and recognition of the communityof interest of producer and consumer. The use of Malaysian Standards is voluntary except in so far as they aremade mandatory by statutory authorities by means of regulations, federal and local by-laws or any other similarways.

The Institute operates entirely on a non-profits basis. It is a grant aided body receiving financial aid from theGovernment, funds from membership subscriptions and proceeds from sales of Standards and otherpublications, fees and licence fees for the use of SIRIM Certification Mark and other activities associated withStandardization, Industrial Research and Consultancy Services.

6