1、Designation:D559418aStandard Test Method forDetermination of the Vinyl Acetate Content of Ethylene-VinylAcetate(EVA)Copolymers by Fourier Transform InfraredSpectroscopy(FT-IR)1This standard is issued under the fixed designation D5594;the number immediately following the designation indicates the yea
2、r oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method covers infrared procedures for deter-mining
3、the vinyl acetate content of EVA copolymers usingpressed films(Procedure A)or molded plaques(Procedure B)and internal corrections for sample thickness.1.2 This test method is applicable to the analysis of EVAcopolymers containing 0.5 to 55%vinyl acetate except asspecified in 1.3.1.3 Talc interferes
4、with the 1020 cm1vinyl acetate band.Resins containing 5%vinyl acetate and talc are excludedfrom the scope of this test method.1.4 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are provided forinformation purposes only.1.5 This standard does not purpo
5、rt to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.Specific precau-tionary statements are given in Se
6、ction 8.NOTE1There is no known ISO equivalent to this standard.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendatio
7、ns issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2E131 Terminology Relating to Molecular SpectroscopyE168 Practices for General Techniques of Infrared Quanti-tative AnalysisE177 Practice for Use of the Terms Precision and Bia
8、s inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodIEEE/ASTM SI-10 Use of the International System of Units(SI):The Modem Metric SystemE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method2.2
9、 ISO Standard:ISO 8985PlasticsEthylene/Vinyl Acetate CopolymerThermoplasticsDetermination of Vinyl Acetate33.Terminology3.1 Definitions:3.1.1 Units,symbols,and abbreviations used in this testmethod appear in Terminology E131 or IEEE/ASTM SI-10.3.2 Abbreviations:3.2.1 EVAethylene-vinyl acetate copoly
10、mer.3.2.2 PTFEtetrafluorethylene polymer.3.2.3 FT-IRFourier transform infrared.4.Summary of Test Method4.1 The vinyl acetate content is measured using infraredabsorption band at 1020 cm1(0.5 to 5%vinyl acetate)or 609cm1(5 to 55%vinyl acetate).4.2 Sample thickness is measured internally using an ethy
11、l-ene infrared absorption band at 720 cm1(28 to 55%vinylacetate),2020 cm1(0.5 to 28%vinyl acetate),or 4250 cm1(5 to 28%vinyl acetate).4.3 Regression analysis is performed on vinyl acetate/ethylene ratios versus known vinyl acetate contents for EVAcopolymer standards.The resulting equation is used to
12、 calcu-late the vinyl acetate content for subsequent EVA copolymersamples.1This test method is under the jurisdiction of ASTM Committee D20 on Plasticsand is the direct responsibility of Subcommittee D20.70 on Analytical Methods.Current edition approved Nov.1,2018.Published November 2018.Originallya
13、pproved in 1994.Last previous edition approved in 2018 as D5594-18.DOI:10.1520/D5594-18A.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary p
14、age onthe ASTM website.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2
15、959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical B
16、arriers to Trade(TBT)Committee.1 5.Significance and Use5.1 Properties of EVA copolymers are affected by theamount of vinyl acetate incorporated in the copolymer:Thistest method provides a means to determine the vinyl acetatelevel in copolymer samples.5.2 Before proceeding with this test method,referenceshould be made to the specification of the material being tested.Any test specimen preparation,conditioning,dimensions,ortesting parameters,or a combination thereof,covered in thematerials specifi
