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【英文标准名称】:StandardTestMethodforCorona-TreatedPolymerFilmsUsingWaterContactAngleMeasurements
【原文标准名称】:用测量水接触角测量结果测定经电晕处理的聚合物薄膜的试验方法
【标准号】:ASTMD5946-2009
【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】:D20.19
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:contactangle;contactanglemeter;coronatreatment;goniometer;polymerfilms;surfacetreatment;water;Contactangle;Coronatreatment;Goniometer;Polymerfilms;Surfacetreatments;Wateranalysis--plasticsprocessing;Waterdroplets;Wettingt
【摘要】:Theabilityofpolymerfilmstoretaininks,coatings,adhesives,etc.isprimarilydependentonthecharacteroftheirsurfacesandcanbeimprovedbyoneofseveralsurface-treatingtechniques.Theelectricaldischargetreatment,suchascoronatreatment,hasbeenfoundtoincreasethewettingtensionofapolymerfilm.Thestrongerthetreatment,themoreactivelythesurfacereactswithdifferentpolarinterfaces.Itisthereforepossibletorelatethecontactangleofapolymerfilmsurfacetoitsabilitytoacceptandretaininks,coatings,adhesives,etc.,iftheink,coating,oradhesivecontainsthepolarfunctionalities.Contactangleinitselfisnotacompletelyacceptablemeasureofink,coating,oradhesiveadhesion.Thewettingtensionofapolymerfilmbelongstoagroupofphysicalparametersforwhichnostandardofaccuracyexists.Thewettingtensionofapolymercannotbemeasureddirectlybecausesolidsdonotchangeshapemeasurablyinreactiontosurfaceenergy.Manyindirectmethodshavebeenproposed.Differenttestmethodstendtoproducedifferentresultsonidenticalsamples.Practicaldeterminationofasolid''ssurfaceenergyusesthisinteractionofthesolidwithtestliquids.Althoughthelevelofsurfacetreatmentofpolymerfilmshasbeentraditionallydefinedintheindustryintermsofdynes/cm(mN/m),thesevaluesarederivedfromasubjectiveinterpretationoftheobservedtestliquidbehavior.Thefollowingrangesofwatercontactanglevaluescanbeusedasaguidefordefiningthelevelofsurfacetreatmentofpolyolefinsandmanyotherpolymerfilmswithinitiallowsurfaceenergies:Marginalornotreatment
>90x00B0;
Lowtreatment
85to90x00B0;
Mediumtreatment
78to84x00B0;
Hightreatment
71to77x00B0;
Veryhightreatment
x003C;71x00B0;