ASTM D6942-2003(2008) 碱性环境中纤维素纤维稳定性的标准试验方法

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【英文标准名称】:StandardTestMethodforStabilityofCelluloseFibersinAlkalineEnvironments
【原文标准名称】:碱性环境中纤维素纤维稳定性的标准试验方法
【标准号】:ASTMD6942-2003(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:2003
【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】:D01.36
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:alkalinestability;cellulosefibers;zero-spanstabilityratio;zero-spantensile;Stability--paints/relatedcoatings/materials;Alkalineenvironments;Cellulosefiber
【摘要】:Thismethodisintendedtoprovideageneralizedprocedurefordeterminingthestabilityofcellulosicpulpfibersexposedtoalkalineenvironments.Specifically,thismethodallowsvariouspulptypestobecomparedwithrespecttotheeffectofexposuretoalkalineconditionsonthestrengthofindividualcellulosicfibersbasedonazero-spantensiletest.Thetimeintervalslistedintheprocedurearenotcritical,andmoreintervalsofshorterorlongerdurationmaybeadded.Inaddition,theproceduremaybesimplifiedbyremovingsomeoftheintermediateintervalssolongasarangeofintervalsisdetermined.Anexampleofasimplifiedprocedurewouldbetodetermine4intervals(forexample,1day,1week,2weeks,4weeks;or1day,3day,7day,14day).Thespecifiedsolution(1NNaOH)isstronglyalkaline.Althoughthisalkaliconcentrationishigherthansomeenvironmentsthatwouldbesimulatedbythistest,thestrongerpHprovidesbetterdifferentiationbetweendifferentcellulosefibertypes.Althoughalkalinestabilitybasedonotheralkalis(forexample,KOH,Ca(OH)2,etc.)atadifferentconcentrationcouldbedeterminedbythismethod,1NNaOHistobeconsideredthestandardsolution.Alkalinestabilityresultsfromothertreatmentsmaybereportedinadditiontothestandardsolutioniftheadditionalsolution(s)provideusefulinformation.1.1Thistestmethoddescribesaprocedurefordeterminingtheeffectofexposuretoalkalineenvironmentsonthestrengthofcellulosefibers.AnalkalineenvironmentisdefinedtobeanymatrixinwhichthepHisgreaterthan8foraperiodof2ormorehours.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Y31
【国际标准分类号】:85_040
【页数】:3P.;A4
【正文语种】:英语