【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】:
基本信息
| 标准名称： | 气体化工产品采样通则 |
| 英文名称： | General rules for sampling gaseous chemical products |
| 中标分类： |
化工 >>
化工综合 >>
基础标准与通用方法 |
| ICS分类： |
化工技术 >>
分析化学 >>
化学分析
|
| 替代情况： | 被GB/T 6681-2003代替 |
| 发布日期： | 1986-08-13 |
| 实施日期： | 1987-07-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 2004-05-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 14页 |
适用范围
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前言
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引用标准
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所属分类： 化工 化工综合 基础标准与通用方法 化工技术 分析化学 化学分析