ASTM_D_2124_-_99_2011.pdf

Designation:D212499(Reapproved 2011)Standard Test Method forAnalysis of Components in Poly(Vinyl Chloride)CompoundsUsing an Infrared Spectrophotometric Technique1This standard is issued under the fixed designation D2124;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 test method provides for the identification ofcertain resins,plasticizers,stabilizers,and fillers in poly(vinylchloride)(PVC)compounds by an infrared spectrophotometrictechnique.In many cases,individual components may bemeasured quantitatively.Complementary procedures,such aschromatographic and other separations,will be necessary toseparate specific components and extend the applications ofthis test method.Other instrumental test methods,such asoptical emission or X-ray spectroscopic methods,may yieldcomplementary information which may allow more completeor,in some cases,easier measurement of the components.Theresin components covered in this test method are listed in theappendix.1.2 PVC formulations are too varied to be covered ad-equately by a single test method.Using the following testmethod,many compounds may be separated into resins,plasticizers,stabilizers,and fillers.A number of componentscan be quantitatively measured.Many more can be identifiedand their concentrations estimated.By the use of preparedstandards,one may determine the usefulness and accuracy ofthe test method for specific PVC formulations.This testmethod is applicable for the resin components listed in theappendix and for other components having similar chemicalcompositions and solubility characteristics.This test methodcan lead to error in cases where the nature of the componentsis not known.1.3 The values stated in SI units are to be regarded as thestandard.The values in brackets are given for information only.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 and health practices and determine the applica-bility of regulatory limitations prior to use.NOTE1There is no known ISO equivalent to this standard.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 Bias inASTM Test MethodsE275 Practice for Describing and Measuring Performance ofUltraviolet and Visible Spectrophotometers3.Terminology3.1 Definitions:3.1.1 For definitions related to the material on infraredspectroscopy,refer to Terminology E131.4.Summary of Test Method4.1 The PVC compound is solvent-extracted in order toseparate the plasticizer from the compound.The resin isdissolved from the remaining compound and the inorganicfillers and stabilizers separated by centrifuging.By thistechnique,the compound is separated into(1)plasticizers,(2)resin,and(3)inorganic stabilizers and fillers.Each may beindividually analyzed by an infrared technique to identify andmeasure the components.5.Significance and Use5.1 PVC compounds are used in a wide variety of productsand hence they are formulated to provide a wide range ofphysical properties.The physical properties required in acompound depend upon the product in which it is used.Theseproperties are largely determined by the type,quantity,andquality of the compounding ingredients.The analytical testmethod described below makes use of infrared spectrophotom-etry for the qualitative or quantitative determination,or both,ofmany of these ingredients in PVC compounds.This testmethod may be used for a variety of applications includingprocess control,raw material acceptance,product evaluation,1This test method is under the jurisdiction of ASTM Committee D20 on Plasticsand is the direct responsibility of Subcommittee D20.70 on Analytical Methods(Section D20.70.08).Current edition approved Feb.1,2011.Published March 2011.Originallyapproved in 1962.Last previous edition approved in 2004 as D2124-99(2004).DOI:10.1520/D2124-99R11.2For 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 States1 and determination of changes in composition resulting fromenvironmental testing.5.2 This test method is directly applicable only to thosecomponents listed in the appendix and to those componentswhich are known to be similar in chemical composition and insolubility characteristics to the chemicals listed in the