【英文标准名称】:StandardTestMethodforDeterminingTemperaturesandHeatsofTransitionsofFluoropolymersbyDifferentialScanningCalorimetry
【原文标准名称】:用差式扫描量热法测定含氟聚合物温度和转化热的标准试验方法
【标准号】:ASTMD4591-2007
【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(US-ASTM)
【起草单位】:D20.15
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:转化;测定;氟;塑料;聚合物;温度;测试
【英文主题词】:differentialscanningcalorimetry;DSC;fluoropolymer(s);heatsoffusion;meltingpoint;thermalanalysis
【摘要】:DSCanalysismaybeusedwithfluoropolymerstoachieveatleastfourdifferentobjectivesasfollows:4.1.1Tomeasuretransitiontemperaturestoaidintheidentificationofthevariousfluoropolymers,individuallyorinmixtures;4.1.2Tocomparetherelativelevelsofcrystallinecontentoftwoormorespecimensofasampleofafluoropolymerrelativetoanothersamplebymeasuringtheheatoffusion;Note28212;Absolutevaluesofcrystallinecontentcannotbedetermineduntilvaluesforheatsoffusionofthecompletelycrystallinepolymersareavailable.4.1.3TocharacterizePTFE(DSCthermalcurvesdeterminedonpowdersorproductsofPTFEthathaveneverbeenmeltedconveyappreciableinformationaboutdetailsofmorphologyandmolecularstructure);44.1.4Tosupplementthetestforstandardspecificgravity(SSG)describedinSpecificationsD4894andD4895byusingtheheatofcrystallizationofpurePTFEhomopolymer,dependingontherelativemolecularweightofthespecimen.Thescopesofthesespecifications,however,includePTFEresinsmodifiedwithsmallamountsofcomonomers,andmanycommercialPTFEresinsaremodifiedinthismanner.Thesemodificationscanhaveprofoundeffectsoncrystallizationbehavior.Publishedrelationships4betweenheatofcrystallizationandmolecularweightrefertopurePTFEhomopolymersand,therefore,cannotbeappliedtothemodifiedresins.1.1Thistestmethoddefinesconditionsfortheuseofdifferentialscanningcalorimetry(DSC)withfluoropolymers.ItcoverstheuseofDSCanalyseswiththefluoropolymers,PTFE,PVDF,PCTFE,andPVFandtheircopolymersPFA,MFA,FEP,ECTFE,EFEP,VDF/HFP,VDF/TFE/HFP,VDF/CTFE.Thetestmethodisapplicabletotheanalysisofpowdersaswellassamplestakenfromsemi-finishedorfinishedproducts.ThenatureoffluoropolymersissuchthatspecialproceduresareneededforrunningDSCanalysisandinterpretingtheresults.1.2ThevaluesstatedinSIunitsasdetailedinIEEE/ASTMSI-10aretoberegardedasthestandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.ThereiscurrentlynoISOstandardthatduplicatesthistestmethod.ISO12086-1andISO12086-2coversimilartestingandreferencethistestmethodfortestingconditions.
【中国标准分类号】:G32
【国际标准分类号】:83_080_20
【页数】:4P.;A4
【正文语种】:


【英文标准名称】:Plastics-Thermoplasticpolyester/esterandpolyether/esterelastomersformouldingandextrusion-Designationsystemandbasisforspecifications
【原文标准名称】:塑料制品.制模和挤压用热塑聚酯/酯和聚醚/酯弹性体.标记系统和规范基础
【标准号】:BSISO14910-1-1998
【标准状态】:现行
【国别】:英国
【发布日期】:1998-04-15
【实施或试行日期】:1998-04-15
【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】:符号;塑料;代码;弹性体;熔点;弹性模量;加强材料;数据块;硬度;模制;填充料;聚酯;模塑材料;聚醚;热塑性聚合物;分类系统;挤压;名称与符号;酯(羧酸)
【英文主题词】:Codes;Datablocks;Designationsystems;Designations;Elastomers;Encoding;Esters;Letters(symbols);Mouldingmaterials;Plastics;Polyesters;Polyethers;Specification;Specification(approval);Thermoplasticpolymers
【摘要】:ThispartofISO14910establishesasystemofdesignationforthermoplasticpolyester/esterandpolyether/esterelastomers,whichmaybeusedasthebasisforspecifications.Thetypesofthermoplasticpolyester/esterandpolyether/esterelastomeraredifferentiatedfromeachotherbyaclassificationsystembasedonappropriatelevelsofthedesignatorypropertiesa)hardness;b)meltingtemperature;c)tensile/flexuralmodulusofelasticity;andoninformationabouttheintendedapplicationand/ormethodofprocessing,importantproperties,additives,colourants,fillersandreinforcingmaterials.ThispartofISO14910isapplicabletoallthermoplasticpolyester/esterandpolyether/esterelastomers.Itappliestomaterialsreadyfornormaluseintheformofpowder,granulesorpellets,unmodifiedormodifiedbycolourants,fillersorotheradditives.Itisnotintendedtoimplythatmaterialshavingthesamedesignationgivenecessarilythesameperformance.ThispartofISO14910doesnotprovideengineeringdata,performancedataordataonprocessingconditionswhichmayberequiredtospecifyamaterialforaparticularapplicationand/ormethodofprocessing.Ifsuchadditionalpropertiesarerequired,theyshallbedeterminedinaccordancewiththetestmethodsspecifiedinpart2ofthisInternationalStandard,ifsuitable.Inordertospecifyathermoplasticpolyester/esterorpolyether/estermaterialforaparticularapplicationortoensurereproducibleprocessing,additionalrequirementsmaybegivenindatablock5(seeclause3,introductoryparagraph).
【中国标准分类号】:G32
【国际标准分类号】:83_080_20
【页数】:14P;A4
【正文语种】:英语