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【英文标准名称】:Methodsoftestingplastics-Mechanicalproperties-Torsionalvibration-Non-resonancemethod
【原文标准名称】:塑料试验方法.机械特性.扭转振动.非共振法
【标准号】:BS2782-3Method323D-1996
【标准状态】:现行
【国别】:英国
【发布日期】:1996-09-15
【实施或试行日期】:1996-09-15
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:定义;测定;动态试验;机械性能;塑料;高聚物;剪切模量;试验;扭转振动
【英文主题词】:Definition;Definitions;Determination;Dynamictesting;Mechanicalproperties;Plastics;Polymers;Shearmodulus;Testing;Torsionalvibrations
【摘要】:ThispartofISO6721describesatorsional,non-resonancemethodfordeterminingthecomponentsoftheshearcomplexmodulusGofsolidpolymersintheformofbarsorrodsatfrequenciestypicallyintherange0,001Hzto100Hz.Themethodissuitableformeasuringdynamicstoragemodulirangingfromabout10MPa,whichistypicalofvaluesobtainedforstiffrubbers,tovaluesofabout10GPawhicharerepresentativeoffibre-reinforcedplastics.Althoughmaterialswithmodulilessthan10MPamaybestud-ied,moreaccuratemeasurementsoftheirdynamicpropertiescanbemadeusingsimpleshear(seeISO6721-6)ortorsionaldeformationsofthinlayersbetweenparallelplates.Thismethodisparticularlysuitedtothemeasurementoflossfactorsgreaterthan0,1andmaythereforebeconvenientlyusedtostudythevariationofdynamicpropertieswithtemperatureandfrequencythroughmostoftheglass-rubberrelaxationregion(seeISO6721-1:1994,subclause9.4).Theavailabilityofdatadeterminedoverwiderangesofbothfrequencyandtemperatureenablemasterplotstobederived,usingfrequency-temperatureshiftprocedures,whichdisplaydynamicpropertiesoveranextendedfre-quencyrangeatdifferenttemperatures.Althoughlossfactorsbelow0,1maybemoreaccu-ratelydeterminedusingthetorsionpendulum(seeISO6721-2),themethoddescribedinthispartofISO6721enablesamuchwiderandcontinuousfre-quencyrangetobecovered.
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:14P.;A4
【正文语种】:英语