【英文标准名称】:StandardTestMethodforMeasurementofAverageViscometricDegreeofPolymerizationofNewandAgedElectricalPapersandBoards
【原文标准名称】:新的和老化的电绝缘纸和纸板聚合作用的平均粘滞程度的测量的标准试验方法
【标准号】:ASTMD4243-1999(2004)e1
【标准状态】:现行
【国别】:
【发布日期】:1999
【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】:D09.19
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:工艺;测量;电气工程;覆层;电绝缘;聚合;粘度;绝缘
【英文主题词】:aging;board;cellulose;eupriethylene-diamine;degreeofpolymerization;paper;pressboard;viscometry
【摘要】:Thistestmethodmaybeappliedtoallpapersmadefromunmodifiedcellulose,asusedintransformer,cable,orcapacitormanufacture.Itappliestoneworagedpapers.Forinformation,AppendixX2showsanexampleofstatisticaldistributionofvaluesfornewpapersintendedfortheinsulationoftransformers,togetherwithinformationrelativetocableandcapacitorpapers.Nevertheless,whereevaluatingthedecompositionstageofagedpapers,takecaretouse,asareference,thevalueofthenewpaperoftheverysameorigin;ofnewpapersbeingafunction,amongotherfactors,oftheirspecificgravityandoftheirmanufacturingprocess.Thistestmethodcanalsobeusedforthedeterminationoftheintrinsicviscosityofsolutionsofchemicallymodifiedpapers,providedthatthesedissolvecompletelyintheselectionsolvent.Thistestmethodshouldbeusedwithcautionwhenitisappliedtopaperswithmineralfillers.1.1Thistestmethoddescribesastandardprocedurefordeterminingtheaverageviscometricdegreeofpolymerization(abbreviatedDPv)ofneworagedelectricalpapers.Thedeterminationismadebymeasuringtheintrinsicviscosityofasolutionofthepaperinanappropriatesolvent.1.2Thedegreeofpolymerization(orthedegreeofcondensation)ofaparticularcellulosemoleculeisthenumberofanhydro--glucosemonomers,C6H10O5,inthecellulosemolecule.Withinasampleofpaper,notallthecellulosemoleculeshavethesamedegreeofpolymerizationsothatthemeanvaluemeasuredbyviscometricmethodsisnotnecessarilythesameasthatwhichmaybeobtainedbyothermethods.Thisstandardmayinvolvehazardousmaterials,operations,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesandtodeterminetheapplicabilityofregulatorylimitationspriortouse.SeeSection9
【中国标准分类号】:K15
【国际标准分类号】:29_035_10
【页数】:7P.;A4
【正文语种】: