ASTM D4243-1999(2009) 新的和老化的电工绝缘纸平均粘滞聚合度的测量的标准试验方法

作者:标准资料网 时间:2024-05-04 22:52:57  浏览:8219   来源:标准资料网

【英文标准名称】:StandardTestMethodforMeasurementofAverageViscometricDegreeofPolymerizationofNewandAgedElectricalPapersandBoards
【原文标准名称】:新的和老化的电工绝缘纸平均粘滞聚合度的测量的标准试验方法
【标准号】:ASTMD4243-1999(2009)
【标准状态】:现行
【国别】:美国
【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】:
【英文主题词】:aging;board;cellulose;cupriethylene-diamine;degreeofpolymerization;paper;pressboard;viscometry;Agingboard;Averageviscometricdegreeofpolymerization(DPv);Celluloseandcellulosederivatives;Cupriethylene-diamine;Ele
【摘要】:Thistestmethodmaybeappliedtoallpapersmadefromunmodifiedcellulose,asusedintransformer,cable,orcapacitormanufacture.Itappliestoneworagedpapers.Forinformation,AppendixX1showsanexampleofstatisticaldistributionofvaluesfornewpapersintendedfortheinsulationoftransformers,togetherwithinformationrelativetocableandcapacitorpapers.Nevertheless,whereevaluatingthedecompositionstageofagedpapers,takecaretouse,asareference,thevalueofthenewpaperoftheverysameorigin;ofnewpapersbeingafunction,amongotherfactors,oftheirspecificgravityandoftheirmanufacturingprocess.Thistestmethodcanalsobeusedforthedeterminationoftheintrinsicviscosityofsolutionsofchemicallymodifiedpapers,providedthatthesedissolvecompletelyintheselectionsolvent.Thistestmethodshouldbeusedwithcautionwhenitisappliedtopaperswithmineralfillers.1.1Thistestmethoddescribesastandardprocedurefordeterminingtheaverageviscometricdegreeofpolymerization(abbreviated)ofneworagedelectricalpapers.Thedeterminationismadebymeasuringtheintrinsicviscosityofasolutionofthepaperinanappropriatesolvent.1.2Thedegreeofpolymerization(orthedegreeofcondensation)ofaparticularcellulosemoleculeisthenumberofanhydro-x03B2;-glucosemonomers,C6H10O5,inthecellulosemolecule.Withinasampleofpaper,notallthecellulosemoleculeshavethesamedegreeofpolymerizationsothatthemeanvaluemeasuredbyviscometricmethodsisnotnecessarilythesameasthatwhichmaybeobtainedbyothermethods.1.3Thisstandardmayinvolvehazardousmaterials,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】:英语