ASTM D4875-2005 聚氨基甲酸乙酯原材料的标准试验方法:聚醚多元醇的聚合环氧乙烷含量的测定

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【英文标准名称】:StandardTestMethodsofPolyurethaneRawMaterials:DeterminationofthePolymerizedEthyleneOxideContentofPolyetherPolyols
【原文标准名称】:聚氨基甲酸乙酯原材料的标准试验方法:聚醚多元醇的聚合环氧乙烷含量的测定
【标准号】:ASTMD4875-2005
【标准状态】:现行
【国别】:
【发布日期】:2005
【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】:D20.22
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:环氧乙烷;试验;化学
【英文主题词】:EOpolymer;EO/POratio;ethyleneoxide;NMR;polyethers;polyols;polyurethanerawmaterials
【摘要】:MeasurementsofEOcontentcorrelatewithpolyolreactivity(asrelatedtoprimaryhydroxylcontent),linearityoffoamrise,andthehydrophilicityofthepolyolandfinalproduct.Statisticaldatasuggestthatthe13CNMRtestmethodisthepreferredmethodformeasuringlowlevels(lessthan10%)ofpolymerizedEOinpolyols.The1Hand13CNMRtestmethodsgivedifferentresultswhicharehighlycorrelated.Theequationofthelinearregressionis:Thestandarddeviationoftheregressionis0.49andthemultipleR-squareis0.9990.1.1TestMethodA8212;ProtonNuclearMagneticResonanceSpectroscopy(1HNMR)measurespolymerizedethyleneoxide(EO)inethyleneoxide-propyleneoxidepolyethersusedinflexibleurethanefoamsandnonfoams.ItissuitablefordiolsmadefromthecommonlyusedinitatorsandcontainingEOpercentagesabovefive.Fortriolsinitiatedwithglycerinandtrimethylolpropane,anuncorrectedEOvalueisobtainedsincebothinitiatorshaveprotonsthatcontributetotheEOmeasurement.1.2TestMethodB8212;Carbon-13NuclearMagneticResonanceSpectroscopy(13CNMR)measuresthepolymerizedEOcontentofethyleneoxide-propyleneoxidepolyethersusedinflexibleurethanefoamsandnonfoams.ItissuitablefordiolsandtriolsmadefromthecommonlyusedinitiatorsandcontainingEOpercentagesabovefive.Note18212;TherearenoequivalentISOstandards.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G31
【国际标准分类号】:83_080_20
【页数】:6P.;A4
【正文语种】: