【英文标准名称】:StandardTerminologyforExpressingConclusionsofForensicDocument
【原文标准名称】:法医文件表示结论用标准术语
【标准号】:ASTME1658-1996
【标准状态】:作废
【国别】:美国
【发布日期】:1996
【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】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:文件检查员;法医表达结论;增强术语学;法医文件检查员;法医技术;术语;结论
【英文主题词】:terminology;expressingconclusionsofforensicdocumentexaminers;emterminology;forensicdocumentexaminers;conclusions;documentexaminers;forensicsciences
【摘要】:
【中国标准分类号】:A13
【国际标准分类号】:01_040_11
【页数】:
【正文语种】:英语


【英文标准名称】:StandardTestMethodsforDeterminationofGelContentandSwellRatioofCrosslinkedEthylenePlastics
【原文标准名称】:交联乙烯塑料的凝胶含量和膨胀系数的标准试验方法
【标准号】:ASTMD2765-2001(2006)
【标准状态】:现行
【国别】:
【发布日期】:2001
【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】:含量测定;塑料;试验
【英文主题词】:crosslinkedethyleneplastics;gelcontent;insoluablefraction;swellratio
【摘要】:Manyimportantpropertiesofcrosslinkedethyleneplasticsvarywiththegelcontent.Hence,determinationofthegelcontentprovidesameansofbothcontrollingtheprocessandratingthequalityoffinishedproducts.Extractiontestspermitverificationofthepropergelcontentofanygivencrosslinkedethyleneplasticandtheyalsopermitcomparisonbetweendifferentcrosslinkedethyleneplastics,includingthosecontainingfillers,providedthat,forthelatter,thefollowingconditionsaremet:5.2.1Thefillerisnotsolubleineitherdecahydronaphthaleneorxylenesattheextractiontemperature.5.2.2Theamountoffillerpresentinthecompoundeitherisknownorcanbedetermined.5.2.3Sufficientcrosslinkinghasbeenachievedtopreventmigrationoffillerduringtheextraction.Usuallyithasbeenfoundthat,atextractionlevelsupto50%,theextractantremainsclearandfreeoffiller.Sincesomeoxidativedegradationofthematerialcanoccurattherefluxtemperatureoftheextractants,asuitableantioxidantisaddedtotheextractanttoinhibitsuchdegradation.Beforeproceedingwiththistestmethod,referenceshouldbemadetothespecificationofthematerialbeingtested.Anytestspecimenpreparation,conditioning,dimensions,ortestingparameters,oracombinationthereof,coveredinthematerialsspecificationshalltakeprecedenceoverthosementionedinthistestmethod.Iftherearenomaterialspecifications,thenthedefaultconditionsapply.1.1Thegelcontent(insolublefraction)producedinethyleneplasticsbycrosslinkingcanbedeterminedbyextractingwithsolventssuchasdecahydronaphthaleneorxylenes.Suchextractiontestmethodsaredescribedherein.Theyareapplicabletocrosslinkedethyleneplasticsofalldensities,includingthosecontainingfillers,andallprovidecorrectionsfortheinertfillerspresentinsomeofthosecompounds.1.2TestMethodA,whichpermitsmostcompleteextractioninleasttime,istobeusedforrefereetests,buttwoalternativenonrefereeTestMethodsBandCarealsodescribed.Thefirstofthesediffersfromtherefereetestmethodonlyinsamplepreparation;thatis,itrequiresuseofshavingstakenatselectedpointsincableinsulation,forexample,ratherthanthegroundsamplerequiredbytherefereetestmethod.Becausetheshavedparticlesarelarger,lesstotalsurfacepersampleisexposedtotheextractant,sothistestmethodordinarilyyieldsextractionvaluesabout1to2%lowerthantherefereemethod.Thesecondofthealternativetestmethodsrequiresthataspecimeninonepiecebeextractedinxylenesataconstanttemperatureof110C.Atthistemperatureandwithaone-piecespecimen,evenlessextractionoccurs(from3to9%lessthantherefereetestmethod)butswellratio(ameasureofthedegreeofcrosslinkinginthegelphase)canbedetermined.1.3Extractiontestscanbemadeonarticlesofanyshape.Theyhavebeenparticularlyusefulforelectricalinsulationssincespecimensmaybeselectedfromthoseportionsoftheinsulationmostsusceptibletoinsufficientcrosslinking.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Theinch-poundunitsinbracketsareforinformationonly.ISO10147issimilartothistest,butisnotequivalent.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecificprecautionarystatementsaregiveninSections,,and.
【中国标准分类号】:G31
【国际标准分类号】:83_080_20
【页数】:8P.;A4
【正文语种】: