BS ISO 16790-2005 塑料.热塑性塑料熔融状态下的拉伸特性测定

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【英文标准名称】:Plastics-Determinationofdrawingcharacteristicsofthermoplasticsinthemoltenstate
【原文标准名称】:塑料.热塑性塑料熔融状态下的拉伸特性测定
【标准号】:BSISO16790-2005
【标准状态】:现行
【国别】:英国
【发布日期】:2005-12-05
【实施或试行日期】:2005-12-05
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:抗断裂强度;共聚物;定义;塑料;抗拉强度;试验;热塑性聚合物
【英文主题词】:Breakingstrength;Copolymers;Definition;Definitions;Plastics;Tensilestrength;Testing;Thermoplasticpolymers
【摘要】:ThisInternationalStandardspecifiesamethodfordeterminingthedrawingandbreakcharacteristicsofmoltenplastics.Themethodinvolvesthemeasurementoftheforcegeneratedindeformingamoltenfilamentunderdefinedextrusiontemperatureanddrawingconditions.Dataisgeneratedundernon-isothermalandnon-homogeneousdeformationconditions.However,itisusefulfortheinterpretationofpolymerbehaviourinextensionalflow.Themethodissuitableforthermoplasticsmouldingandextrusionmaterialsthatcanbeextrudedusingacapillaryextrusionrheometer,oranextruderwithcapillaryroddieorotherextrusiondevices,andhavesufficientmeltstrengthtobehandledwithoutdifficulty.Suchmaterialsshouldbechemicallystableandproduceauniformextrudatefreefromheterogeneities,bubbles,unmeltedimpurities,etc.Thismethodmayprovideinformationon:—processabilityforallextrusiontechniques;—theeffectofmechanicalandthermalhistory;—theeffectofchemicalstructure,suchasbranching,entanglementsandmolecularmass.Thistechniqueisoneofanumberoftechniquesthatcanbeusedtomeasuretheextensionalflowbehaviourofamaterial.Thismethodofmeasurementdoesnotnecessarilyreproducethedrawingconditionstowhichthermoplasticsaresubjectedtoduringtheirprocessing.
【中国标准分类号】:G31
【国际标准分类号】:83_080_20
【页数】:24P;A4
【正文语种】:英语