BS EN 828-1998 粘合剂.湿润度.固体表面接触角和临界表面张力的测定

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【英文标准名称】:Adhesives.Wettability.Determinationbymeasurementofcontactangleandcriticalsurfacetensionofsolidsurface
【原文标准名称】:粘合剂.湿润度.固体表面接触角和临界表面张力的测定
【标准号】:BSEN828-1998
【标准状态】:现行
【国别】:英国
【发布日期】:1998-12-15
【实施或试行日期】:1998-12-15
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:胶粘剂;接触角;定义(术语);测定;精整;连接材料;材料;材料测试;测量;方法;安全性;表面张力;表面;温度;测试;润湿度
【英文主题词】:Adhesives;Contactangles;Definitions;Determination;Finishes;Joiningmaterials;Materials;Materialstesting;Measurement;Methods;Safety;Surfacetension;Surfaces;Temperature;Testing;Wettability
【摘要】:ThisEuropeanStandardspecifiesthedeterminationoftheabilityofanadhesivetoVet'asolidsurfacebymeasuringthecontactangleanddeterminingthecriticalsurfacetensionofwettability.ItallowsthepredictionofwhatadhesivewillwetwhichadherentItmaybeusedtocharacterizesurfacesafterpriming,coatingandbonding.NOTE.1Ingeneralthecontactangleisdependentontheproceedingmotionoftheborderlineoftheliquid(i.e.onthemodeofapplication),avaluebetweentwoborderlinevalues,theadvancingangle(e.g.afteranextensionofadrop)andtherecedingangle(e.g.afterareductionofadrop).Onlyifthisdifferencebetweenboth,termedhysteresisofcontactangle,isnegligible,doesthecontactangleexpressthecriticalsurfacetensiondefinedinthermodynamicsasasubstrate-specificcharacteristicvalue.Normally,thehysteresiswillnotbenegligiblewhentherugositiesareabove0,5mmandwhentheheterogeneousphaseisnotsmallerthan0,1mm.Theshapeoftherugosityisessentialforthehysteresis.NOTE.2Foracomparisonofwettingbehaviour,theadvancingangleshouldalwaysbemeasuredhere.
【中国标准分类号】:G38
【国际标准分类号】:83_180
【页数】:12P.;A4
【正文语种】:英语