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【英文标准名称】:StandardPracticeforPlastics:DynamicMechanicalProperties:DeterminationandReportofProcedures
【原文标准名称】:塑料的标准实施规程:动态机械特性:程序测定和报告
【标准号】:ASTMD4065-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D20.10
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:测定;机械性能;塑料;工艺;特性;报告
【英文主题词】:dynamicmechanical;modulus;rheological;tandelta;viscoelastic
【摘要】:Dynamicmechanicaltestingprovidesamethodfordeterminingelasticandlossmoduliasafunctionoftemperature,frequencyortime,orboth.Aplotoftheelasticmodulusandlossmodulusofmaterialversustemperatureprovidesagraphicalrepresentationofelasticityanddampingasafunctionoftemperatureorfrequency.Thisprocedurecanbeusedtolocatetransitiontemperaturesofplastics,thatis,changesinthemolecularmotionsofapolymer.Inthetemperaturerangeswheresignificantchangesoccur,elasticmodulusdecreasesrapidlywithincreasingtemperature(atconstantornearconstantfrequency)orincreaseswithincreasingfrequency(atconstanttemperature).Amaximumisobservedforthelossmodulus,aswellasforthetandeltacurve,inthetransitionregion.Thisprocedurecanbeused,forexample,toevaluatebycomparisontoknownreferencematerialsorcontrolmaterials:5.3.1Degreeofphaseseparationinmulticomponentsystems,5.3.2Fillertype,amount,pretreatment,anddispersion,and5.3.3Effectsofcertainprocessingtreatment.Thisprocedurecanbeusedtodeterminethefollowing:5.4.1Stiffnessofpolymercomposites,especiallyasafunctionoftemperature,5.4.2Degreeofpolymercrystallinity,and5.4.3Magnitudeoftriaxialstressstateintherubberphaseofrubbermodifiedpolymers.Thisprocedureisusefulforqualitycontrol,specificationacceptance,andresearch.Proceduralmodificationsinmaterialspecificationstakeprecedencetothispractice.Therefore,consulttheappropriatematerialspecificationbeforeusingthispractice.Table1ofClassificationSystemD4000liststheASTMmaterialsstandardsthatcurrentlyexist.1.1Thispracticeisforgeneraluseingatheringandreportingdynamicmechanicaldata.Itincorporateslaboratorypracticefordeterminingdynamicmechanicalpropertiesofplasticspecimenssubjectedtovariousoscillatorydeformationsonavarietyofinstrumentsofthetypecommonlycalleddynamicmechanicalanalyzersordynamicthermomechanicalanalyzers.1.2Thispracticeisintendedtoprovidemeansofdeterminingthetransitiontemperatures,elastic,andlossmoduliofplasticsoverarangeoftemperatures,frequencies,ortime,byfreevibrationandresonantornonresonantforcedvibrationtechniques.Plotsofelasticandlossmoduliareindicativeoftheviscoelasticcharacteristicsofaplastic.Thesemoduliarefunctionsoftemperatureorfrequencyinplastics,andchangerapidlyatparticulartemperaturesorfrequencies.Theregionsofrapidmodulichangearenormallyreferredtoastransitionregions.1.3Thepracticeisprimarilyusefulwhenconductedoverarangeoftemperaturesfrom160Ctopolymerdegradationandisvalidforfrequenciesfrom0.01to1000Hz.1.4Thispracticeisintendedformaterialsthathaveanelasticmodulusintherangefrom0.5MPato100GPa[73psito1.5107psi].1.5Discrepanciesinresultsareknowntoarisewhenobtainedunderdifferingexperimentalconditions.Withoutchangingtheobserveddata,reportinginfull(asdescribedinthispractice)theconditionsunderwhichthedatawereobtainedwillenableapparentdifferencesobservedinanotherstudytobereconciled.Anassumptionofthistechniqueisthattestingisconductedintheregionoflinearviscoelasticbehavior.1.6Differentmodesofdeformation,suchastensile,bendingandshear,areused,aslistedinthereferencedtestmethods.1.7Testdataobtainedbythispracticearerelevantandappropriateforuseinengineeringdesign.1.8ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninbracketsaref......
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:7P.;A4
【正文语种】: