ISO 489-1999 塑料反射指数的测定

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【英文标准名称】:Plastics-Determinationofrefractiveindex
【原文标准名称】:塑料反射指数的测定
【标准号】:ISO489-1999
【标准状态】:现行
【国别】:国际
【发布日期】:1999-04
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC61
【标准类型】:()
【标准水平】:()
【中文主题词】:测定;浸渍试验;折射测量法;浸入试验;光学试验;塑料;折射指数;试验;试验;分析
【英文主题词】:Analysis;Determination;Determinationprocedures;Immersiontests;Immersiontests(corrosion);Materialstesting;Measuringtechniques;Mouldedparts;Opticaltests;Plasticfilms;Plastics;Refractiveindex;Refractometry;Testing
【摘要】:ThisInternationalStandardspecifiestwotestmethodsfordeterminingtherefractiveindexofplastics,namely:—MethodA:arefractometricmethodformeasuringtherefractiveindexofmouldedparts,castorextrudedsheetorfilm,bymeansofarefractometer.Itisapplicablenotonlytoisotropictransparent,translucent,colouredoropaquematerialsbutalsotoanisotropicmaterials.Themethodisrecommendedwhengreataccuracyisrequired.Itisnotapplicabletopowderedorgranulatedmaterial.—MethodB:animmersionmethod(makinguseoftheBeckelinephenomenon)fordeterminingtherefractiveindexofpowderedorgranulatedtransparentmaterialsbymeansofamicroscope.Monochromaticlightshould,ingeneral,beusedtoavoiddispersioneffects.TheaccuracyofthismethodisaboutthesameasthatofmethodA.Itisapplicabletoisotropictranslucent,colouredmaterialsbutisnotapplicabletoopaquematerialsnortoanisotropicmaterials.NOTE1Therefractiveindexisafundamentalpropertywhichcanbeusedforcheckingpurityandcomposition,fortheidentificationofmaterialsandforthedesignofopticalparts.Thechangeinrefractiveindexwithtemperaturemaygiveanindicationoftransitionpointsofmaterials.NOTE2TheaccuracyofmethodBisapproximatelythesameasthatofmethodAwhenanexperiencedoperatorusesthemethodwithextremecare(seeclause7).
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:11P;A4
【正文语种】:英语