ASTM_D_5477_-_18.pdf

Designation:D547718Standard Practice forIdentification of Polymer Layers or Inclusions by FourierTransform Infrared Microspectroscopy(FT-IR)1This standard is issued under the fixed designation D5477;the number immediately following the designation indicates the year 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.Scope1.1 This practice describes the techniques used for detectingtwo different polymer entities such as:1.1.1 Abnormal specks or spots on a surface or in the filmthat are objectionable as defects and1.1.2 Layers of different polymeric sheets commonly usedas barrier films made by coextrusion.1.2 This practice utilizes through-transmittance optical andinfrared techniques.1.3 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.4 This standard does not purport 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.Specific hazard statements are given in Section 7.NOTE1There is no known ISO equivalent to this standard.1.5 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-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D883 Terminology Relating to PlasticsD1248 Specification for Polyethylene Plastics ExtrusionMaterials for Wire and CableD1600 Terminology forAbbreviated Terms Relating to Plas-ticsE131 Terminology Relating to Molecular SpectroscopyE168 Practices for General Techniques of Infrared Quanti-tative AnalysisE2015 Guide for Preparation of Plastics and PolymericSpecimens for Microstructural ExaminationIEEE/ASTM SI-10 Standard for Use of the InternationalSystem of Units(SI):The Modern Metric System3.Terminology3.1 Definitions:3.1.1 For definitions of the terms used in this practice,referto Terminologies D883 and D1600.3.1.2 For units,symbols,and abbreviations used in thispractice,refer to Terminology E131 or IEEE/ASTM SI-10.4.Significance and Use4.1 Aspeck will ultimately cause a failure to occur by virtueof its appearance in a film or by the decrease in electrical ormechanical properties in the polymer substrate(see Specifica-tion D1248).4.2 The analysis of composite layers for barrier purposes bymicroscopic Fourier transform infrared spectroscopy(FT-IR)can indicate the adequacy of the barrier tape or indicate why abarrier may be defective(a missing layer or hole in the layer orpoor coextrusion practice).Fig.1 represents a typical multi-layer film.5.Apparatus5.1 FT-IR Spectrophotometer,with nominal 4-cm1resolu-tion(see Practices E168).5.2 Microsampling Accessory,accommodated into theFT-IR for microscopic infrared analysis,with nominal 6.25-mresolution in the infrared mode.5.3 Optical Microscope,equipped with cross-polarized lightand phase contrast accessories.May be incorporated into theinfrared microsampling accessory.5.4 Hot-Stage,with temperature readout,is accommodatedinto the optical microscope or microsampling accessory.5.5 Microtome,capable of 25 m slices 62.5 m.1This practice is under the jurisdiction ofASTM Committee D20 on Plastics andis the direct responsibility of Subcommittee D20.70 on Analytical Methods.Current edition approved Aug.1,2018.Published August 2018.Originallypublished as D5477 93.Last previous edition approved in 2011 as D5477 11.DOI:10.1520/D5477-18.2For 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 page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.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 Barriers to Trade(TBT)Committee.1 6.Material6.1 Stiff plastic at 25C,1.25 mm thick and large enough tohold sample(for example,ABS,boPET).6.2 Cyano-acrylate adhesive.6.3 Thermoset material for encapsulating sample(forexample,2-part epoxy,acrylic).6.4 Glass microscope slide to support sample slice duringinspection.7.Hazards7.1 The FT-IR spectrophotometer contains a laser.To avoideye injury,do not stare directly into the laser beam.7.2 Use gloves when