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Designation:E595–06

StandardTestMethodfor

TotalMassLossandCollectedVolatileCondensable

MaterialsfromOutgassinginaVacuumEnvironment

1

ThisstandardisissuedunderthefixeddesignationE595;thenumberimmediatelyfollowingthedesignationindicatestheyearof

originaladoptionor,inthecaseofrevision,rinparenthesesindicatestheyearoflastreapproval.A

superscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.

ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.

1.1Thistestmethodcoversascreeningtechniquetodeter-

minevolatilecontentofmaterialswhenexposedtoavacuum

ametersaremeasured:totalmassloss

(TML)andcollectedvolatilecondensablematerials(CVCM).

Anadditionalparameter,theamountofwatervaporregained

(WVR),canalsobeobtainedaftercompletionofexposures

andmeasurementsrequiredforTMLandCVCM.

1.2Thistestmethoddescribesthetestapparatusandrelated

operatingproceduresforevaluatingthemasslossofmaterials

beingsubjectedto125°Catlessthan7310

−3

Pa(5310

−5

torr)rallmasslosscanbeclassifiedinto

terarecharacter-

izedhereinasbeingcapableofcondensingonacollectorata

temperatureof25°C.

N

OTE

1—Unlessotherwisenoted,thetoleranceon25and125°Cis

61°Candon23°Cis62°eranceonrelativehumidityis65%.

subsequentfunctional,developmental,andqualificationtests

shouldbeused,asnecessary,toensurethatthematerial’s

performanceissatisfactory.

1.7Thisstandarddoesnotpurporttoaddressallofthe

eresponsibility

oftheuserofthisstandardtoestablishappropriatesafetyand

healthpracticesanddeterminetheapplicabilityofregulatory

limitationspriortouse.

ncedDocuments

2.1ASTMStandards:

2

E177PracticeforUseoftheTermsPrecisionandBiasin

ASTMTestMethods

2.2ASTMAdjuncts:

MicroVCMDetailedDrawings

3

ology

3.1Definitions:

3.1.1collectedvolatilecondensablematerial,CVCM—the

quantityofoutgassedmatterfromatestspecimenthatcon-

densesonacollectormaintainedataspecificconstanttem-

peratureforaspecifiexpressedasa

percentageoftheinitialspecimenmassandiscalculatedfrom

thecondensatemassdeterminedfromthedifferenceinmassof

thecollectorplatebeforeandafterthetest.

3.1.2totalmassloss,TML—totalmassofmaterialout-

gassedfromaspecimenthatismaintainedataspecified

constanttemperatureandoperatingpressureforaspecified

alculatedfromthemassofthespecimenas

measuredbeforeandafterthetestandisexpressedasa

percentageoftheinitialspecimenmass.

3.1.3watervaporregained,WVR—themassofthewater

vaporregainedbythespecimenaftertheoptionalrecondition-

alculatedfromthedifferencesinthe

specimenmassdeterminedafterthetestforTMLandCVCM

1.3Manytypesoforganic,polymeric,andinorganicmate-

ncludepolymerpottingcompounds,

foams,elastomers,films,tapes,insulations,shrinktubings,

adhesives,coatings,fabrics,tiecords,

materialsmaybetestedinthe“as-received”conditionor

preparedfortestbyvariouscuringspecifications.

1.4Thistestmethodisprimarilyascreeningtechniquefor

materialsandisnotnecessarilyvalidforcomputingactual

contaminationonasystemorcomponentbecauseofdiffer-

encesinconfiguration,temperatures,andmaterialprocessing.

1.5Thecriteriausedfortheacceptanceandrejectionof

materialsshallbedeterminedbytheuserandbasedupon

specifiically,

TMLof1.00%andCVCMof0.10%havebeenusedas

screeninglevelsforrejectionofspacecraftmaterials.

1.6Theuseofmaterialsthataredeemedacceptablein

accordancewiththistestmethoddoesnotensurethatthe

ore,

ThistestmethodisunderthejurisdictionofASTMCommitteeE21onSpace

SimulationandApplicationsofSpaceTechnologyandisthedirectresponsibilityof

SubcommitteeE21.05onContamination.

CurrenteditionapprovedNov.1,ally

eviouseditionapprovedin2003asE595–93(2003)

e2

.

1

ForreferencedASTMstandards,visittheASTMwebsite,,or

contactASTMCustomerServiceatservice@ualBookofASTM

Standardsvolumeinformation,refertothestandard’sDocumentSummarypageon

theASTMwebsite.

3

AvailablefromASTMInternational,100BarrHarborDr.,POBoxC700,West

Conshohocken,PA19428–djunctADJE0595.

2

Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.

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Copyright ASTM International

Provided by IHS under license with ASTM

No reproduction or networking permitted without license from IHS

1

Licensee=USN Ship Repair Facility Yokosuka/9961031100

Not for Resale, 04/29/2007 20:27:42 MDT

E595–06

andagainafterexposuretoa50%relativehumidityatmo-

sphereat23°xpressedasapercentageof

theinitialspecimenmass.

yofTestMethod

4.1Thismicrovolatilecondensablesystem

4

wasdeveloped

fromanearliersystemfordeterminationofmacrovolatile

condensablesthatrequiredmuchlargersamplesandalonger

test.

4.2Thetestspecimenisexposedto23°Cand50%relative

humidityfor24hinapreformed,degreasedcontainer(boat)

hisexposure,theboatand

specimenareweighedandputinoneofthespecimencom-

partmentsinacopperheatingbarthatispartofthetest

perheatingbarcanaccommodateanumber

uumchamberin

whichtheheatingbarandotherpartsofthetestapparatusare

placedisthensealedandevacuatedtoavacuumofatleast

7310

−3

Pa(5310

−5

torr).Theheatingbarisusedtoraisethe

specimencompartmenttemperatureto125°uses

vaporfromtheheatedspecimentostreamfromtheholeinthe

onofthevaporpassesintoa

collectorchamberinwhichsomevaporcondensesona

previously-weighedandindependentlytemperature-controlled,

chromium-platedcollectorplatethatismaintainedat25°C.

Eachspecimencompartmenthasacorrespondingcollector

chamberthatisisolatedfromtheothersbyacompartmented

24h,the

testapparatusiscooledandthevacuumchamberisrepressur-

izedwithadry,cimenandthecollectorplates

eseresultsandthespecimenmass

determinedbeforethevacuumexposure,thepercentageTML

ly,thereported

valuesareanaverageofthepercentagesobtainedfromthree

samplesofthesamematerial.

N

OTE

2—Itisalsopossibletoconductinfraredandotheranalyticaltests

chloride

flflatsarenominally24mm

(1in.)indiameterby3.2mm(0.125in.)thickandaresupportededgewise

inametalholderthatfiletion

ofthetest,theflatsareplacedintoaninfraredsaltflatholderfor

ternativemethod,

thecondensatemaybedissolvedfromthemetalliccollector,thesolvent

evaporated,andtheresiduedepositedonasaltflatforinfraredtests.

SodiumchlorideflatsshallnotbeusedforCVCMdeterminations.

random,canbeusedascontrolstoensurethatuniform

cleaningprocedureshavebeenfollowedaftereachtest.

4.5Atypicaltestapparatuscanhave24specimenchambers

with24associatedcollectorplatessothatanumberof

specimensofdifferenttypescanbetestedeachtimethe

pecimencompart-

mentscanserveascontrolsandthreecanbeusedforeachtype

altimerequiredforspecimens

equipmentshouldbecalibratedatleastonceayearbyusing

previouslytestedmaterialsastestspecimens.

4.6Theapparatusmaybeorientedinanydirectionaslong

astheconfigurationshownin

Fig.1ismaintainedandbulk

materialdoesnotfallfromthesampleholdernorobstructthe

ensionsforcriticalcomponentsgivenin

Fig.2andTable1areprovidedsothatapparatusconstructed

forthepurposeofthistestmayprovideuniformandcompa-

rableresults.

ficanceandUse

5.1Thistestmethodevaluates,undercarefullycontrolled

conditions,thechangesinthemassofatestspecimenon

exposureundervacuumtoatemperatureof125°Candthe

massofthoseproductsthatleavethespecimenandcondense

onacollectoratatemperatureof25°C.

5.2Comparisonsofmaterialoutgassingpropertiesarevalid

at125°Csampletemperatureand25°Ccollectortemperature

stestedatothertemperaturesmaybecompared

onlywithothermaterialswhichweretestedatthatsame

temperature.

5.3Themeasurementsofthecollectedvolatilecondensable

materialarealsocomparableandvalidonlyforsimilar

collectorgeometryandsurfacesat25°shavebeen

testedatsampletemperaturesfrom50to400°Candatcollector

temperaturesfrom1to30°ken

atnonstandardconditionsmustbeclearlyidentifiedandshould

notbecomparedwithsamplestestedat125°Csampletem-

peratureand25°Ccollectortemperature.

4.3Afterthespecimenhasbeenweighedtodeterminethe

TML,theWVRcanbedetermined,ifdesired,asfollows:the

specimenisstoredfor24hat23°Cand50%relativehumidity

cimenmassafterthis

eseresultsandthespecimen

massdeterminedaftervacuumexposure,thepercentageWVR

isobtained.

4.4Twoorthreeemptyspecimenchambersintheheaterbar

andcollectorplatesonthecoldbar,selectedforeachtestat

Muraca,R.F.,andWhittick,J.S.,“PolymersforSpacecraftApplications.”SRI

ProjectASD-5046,NASACR-89557,N67-40270,StanfordResearchInstitute,

September1967.

4

FIG.1SchematicofCriticalPortionofTestApparatus(Section

A-AofFig.2)

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Copyright ASTM International

Provided by IHS under license with ASTM

No reproduction or networking permitted without license from IHS

2

Licensee=USN Ship Repair Facility Yokosuka/9961031100

Not for Resale, 04/29/2007 20:27:42 MDT