作者:标准资料网 时间:2024-05-28 04:26:31   浏览:9004   来源:标准资料网

【英文标准名称】:StandardTestMethodforMeltingPointofPetroleumWax(CoolingCurve)
【原文标准名称】:石油蜡熔点的标准试验方法(冷却曲线)
【标准号】:ASTMD87-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:D02.10.0A
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:coolingcurve;meltingpoint;petroleumwax;wax;Coolingcharacteristics/profiles;Coolingcurveanalysis;Meltingpoint;Petroleumwax
【摘要】:Meltingpoint(coolingcurve)isatestthatiswidelyusedbywaxsuppliersandconsumers.itisparticularlyappliedtopetroleumwaxesthatareratherhighlyparaffinicorcrystallineinnature.Aplateauoccurswithspecimenscontainingappreciableamountsofhydrocarbonsthatcrystallizeatthesametemperature,givingupheatoffusion,thustemporarilyretardingthecoolingrate.Ingeneral,petroleumwaxeswithlargeamountsofnon-normalhydrocarbonsorwithamorphoussolidformswillnotexhibitaplateau.1.1Thistestmethodcoversthedeterminationofthemeltingpoint(coolingcurve)ofpetroleumwax.Itisunsuitableforwaxesofthepetrolatumgroup,microcrystallinewaxes,orblendsofsuchwaxeswithparaffinwaxorscalewax.Note18212;Foradditionalmethodsusedfortestingpetroleumwaxes,seeTestMethodD127andTestMethodD938.Resultsmaydiffer,dependingonthemethodused.Forpharmaceuticalpetrolatum,TestMethodD127usuallyisused.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:E42
【国际标准分类号】:75_140
【页数】:5P.;A4
【正文语种】:英语