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MIL-F-25173A (NOTICE 1)

作者:标准资料网 时间:2024-05-29 14:11:05  浏览:8885   来源:标准资料网
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MIL-F-25173A (NOTICE 1), MILITARY SPECIFICATION: FASTENER (DZUS), CONTROL PANEL, AIRCRAFT EQUIPMENT (22 AUG 1994)., MIL-F-25173A dated 16 February 1956 is inactive for new design.
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【英文标准名称】:StandardTestMethodforPlastics:DynamicMechanicalProperties:MeltRheology
【原文标准名称】:塑料的标准试验方法:动力机械性能:熔体流变学
【标准号】:ASTMD4440-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:D20.10
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:测量;熔化;塑料;高聚物;工艺;流变性能
【英文主题词】:
【摘要】:Thistestmethodprovidesasimplemeansofcharacterizingtheimportantrheologicalpropertiesandviscosityofthermoplasticpolymersusingverysmallamountsofmaterial(approximately25to50mmindiameterby1to3mminthickness...approximately3to5g).Datamaybeusedforqualitycontrol,researchanddevelopment,andestablishmentofoptimumprocessingconditions.Dynamicmechanicaltestingprovidesasensitivemethodfordeterminingmoltenpolymerpropertiesbymeasuringtheelasticandlossmoduliasafunctionoffrequency,strain,temperature,ortime.Plotsofviscosity,storage,andlossmoduli,andtandeltaasafunctionoftheaforementionedprocessparametersprovidegraphicalrepresentationindicativeofmolecularweight,molecularweightdistribution,effectsofchainbranching,andmelt-processabilityforspecifiedconditions.Valuesobtainedinthistestmethodcanbeusedtoassessthefollowing:5.3.1Complexviscosityofthepolymermeltasafunctionofdynamicoscillation,5.3.2Processingviscosity,minimumaswellaschangesinviscosityasafunctionofexperimentalparameters,5.3.3Effectsofprocessingtreatment,5.3.4Relativepolymerbehavioralproperties,includingviscosityanddamping,and5.3.5Effectsofformulationadditivesthatmightaffectprocessabilityorperformance.Beforeproceedingwiththistestmethod,referenceshouldbemadetothespecificationofthematerialbeingtested.Anytestspecimenpreparation,conditioning,dimensions,ortestingparameters,orcombinationthereof,coveredintherelevantASTMmaterialsspecificationshalltakeprecedenceoverthosementionedinthetestmethod.IftherearenorelevantASTMmaterialspecifications,thenthedefaultconditionsapply.1.1Thistestmethodoutlinestheuseofdynamicmechanicalinstrumentationindeterminingandreportingtherheologicalpropertiesofthermoplasticresinsandothertypesofmoltenpolymers.Itmaybeusedasamethodfordeterminingthecomplexviscosityandothersignificantviscoelasticcharacteristicsofsuchmaterialsasafunctionoffrequency,strainamplitude,temperature,andtime.Suchpropertiesmaybeinfluencedbyfillersandotheradditives.1.2Itincorporatesalaboratorytestmethodfordeterminingtherelevantrheologicalpropertiesofapolymermeltsubjectedtovariousoscillatorydeformationsonaninstrumentofthetypecommonlyreferredtoasamechanicalordynamicspectrometer.1.3Thistestmethodisintendedtoprovideameansofdeterminingtherheologicalpropertiesofmoltenpolymers,suchasthermoplasticsandthermoplasticelastomersoverarangeoftemperaturesbynonresonant,forced-vibrationtechniques.Plotsofmodulus,viscosity,andtandeltaasafunctionofdynamicoscillation(frequency),strainamplitude,temperature,andtimeareindicativeoftheviscoelasticpropertiesofamoltenpolymer.1.4Thistestmethodisvalidforawiderangeoffrequencies,typicallyfrom0.01to100Hz.1.5Thistestmethodisintendedforhomogenousandheterogeneousmoltenpolymericsystemsandcompositeformulationscontainingchemicaladditives,includingfillers,reinforcements,stabilizers,plasticizers,flameretardants,impactmodifiers,processingaids,andotherimportantchemicaladditivesoftenincorporatedintoapolymericsystemforspecificfunctionalproperties,andwhichcouldaffecttheprocessabilityandfunctionalperformance.Thesepolymericmaterialsystemshavemoltenviscositiestypicallylessthan106Pas(107poise).1.6Apparentdiscrepanciesmayariseinresultsobtainedunderdifferingexperimentalconditions.Withoutchangingtheobserveddata,reportinginfull(asdescribedinthistestmethod)thecond......
【中国标准分类号】:G31
【国际标准分类号】:
【页数】:4P.;A4
【正文语种】:


【英文标准名称】:StandardTestMethodforPlastics:DynamicMechanicalPropertiesMeltRheology
【原文标准名称】:塑料的标准试验方法:动力机械性能.熔体流变学
【标准号】:ASTMD4440-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:
【英文主题词】:Dynamicmechanicalanalysis(DMA)--plastics;Flowandflowrate--thermoplastics;Frequencymeasurements;Meltindex;Polymers;Rheology/rheologicalproperties--plastics;Straintesting--plastics;Thermoplasticresins;Viscoelasticproperties;Viscosity--p
【摘要】:Thistestmethodprovidesasimplemeansofcharacterizingtheimportantrheologicalpropertiesandviscosityofthermoplasticpolymersusingverysmallamountsofmaterial(approximately25to50mmindiameterby1to3mminthickness...approximately3to5g).Datamaybeusedforqualitycontrol,researchanddevelopment,andestablishmentofoptimumprocessingconditions.Dynamicmechanicaltestingprovidesasensitivemethodfordeterminingmoltenpolymerpropertiesbymeasuringtheelasticandlossmoduliasafunctionoffrequency,strain,temperature,ortime.Plotsofviscosity,storage,andlossmoduli,andtandeltaasafunctionoftheaforementionedprocessparametersprovidegraphicalrepresentationindicativeofmolecularweight,molecularweightdistribution,effectsofchainbranching,andmelt-processabilityforspecifiedconditions.Valuesobtainedinthistestmethodcanbeusedtoassessthefollowing:Complexviscosityofthepolymermeltasafunctionofdynamicoscillation,Processingviscosity,minimumaswellaschangesinviscosityasafunctionofexperimentalparameters,Effectsofprocessingtreatment,Relativepolymerbehavioralproperties,includingviscosityanddamping,andEffectsofformulationadditivesthatmightaffectprocessabilityorperformance.Beforeproceedingwiththistestmethod,referenceshouldbemadetothespecificationofthematerialbeingtested.Anytestspecimenpreparation,conditioning,dimensions,ortestingparameters,orcombinationthereof,coveredintherelevantASTMmaterialsspecificationshalltakeprecedenceoverthosementionedinthetestmethod.IftherearenorelevantASTMmaterialspecifications,thenthedefaultconditionsapply.1.1Thistestmethodoutlinestheuseofdynamicmechanicalinstrumentationindeterminingandreportingtherheologicalpropertiesofthermoplasticresinsandothertypesofmoltenpolymers.Itmaybeusedasamethodfordeterminingthecomplexviscosityandothersignificantviscoelasticcharacteristicsofsuchmaterialsasafunctionoffrequency,strainamplitude,temperature,andtime.Suchpropertiesmaybeinfluencedbyfillersandotheradditives.1.2Itincorporatesalaboratorytestmethodfordeterminingtherelevantrheologicalpropertiesofapolymermeltsubjectedtovariousoscillatorydeformationsonaninstrumentofthetypecommonlyreferredtoasamechanicalordynamicspectrometer.1.3Thistestmethodisintendedtoprovideameansofdeterminingtherheologicalpropertiesofmoltenpolymers,suchasthermoplasticsandthermoplasticelastomersoverarangeoftemperaturesbynonresonant,forced-vibrationtechniques.Plotsofmodulus,viscosity,andtandeltaasafunctionofdynamicoscillation(frequency),strainamplitude,temperature,andtimeareindicativeoftheviscoelasticpropertiesofamoltenpolymer.1.4Thistestmethodisvalidforawiderangeoffrequencies,typicallyfrom0.01to100Hz.1.5Thistestmethodisintendedforhomogenousandheterogeneousmoltenpolymericsystemsandcompositeformulationscontainingchemicaladditives,includingfillers,reinforcements,stabilizers,plasticizers,flameretardants,impactmodifiers,processingaids,andotherimportantchemicaladditivesoftenincorporatedintoapolymericsystemforspecificfunctionalproperties,andwhichcouldaffecttheprocessabilityandfunctionalperformance.Thesepolymericmaterialsystemshavemoltenviscositiestypicallylessthan106Pax00B7;s(107poise).1.6Apparentdiscrepanciesmayariseinresultsobtainedunderdifferingexperimentalconditions.Withoutchangingtheobserveddata,reportinginfull(asdescribedinthistestmethod)theconditionsunderwhicht......
【中国标准分类号】:G31
【国际标准分类号】:
【页数】:5P.;A4
【正文语种】:英语



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