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Significance and Use
Properties of EVA copolymers are affected by the amount of vinyl acetate incorporated in the copolymer: This test method provides a means to determine the vinyl acetate level in copolymer samples.
Before proceeding with this test method, reference should be made to the specification of the material being tested. Any test specimen preparation, conditioning, dimensions, or testing parameters, or a combination thereof, covered in the materials specification shall take precedence over those mentioned in this test method. If there are no material specifications, then the default conditions apply.
1.1 This test method covers infrared procedures for determining the vinyl acetate content of EVA copolymers using pressed 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 EVA copolymers containing 0.5 to 55 % vinyl acetate except as specified in 1.3.
1.3 Talc interferes with the 1020 cm−1 vinyl acetate band. Resins containing <5 % vinyl acetate and talc are excluded from the scope of this test method.
1.4 The values stated in SI units are to be regarded as the standard. The values given in brackets are provided for information purposes only.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in Section 8.
Note 1—This test method is not equivalent to ISO 8985.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
E131 Terminology Relating to Molecular Spectroscopy
E168 Practices for General Techniques of Infrared Quantitative Analysis
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ISO StandardISO8985 Plastics--Ethylene/Vinyl Acetate Copolymer Thermoplastics--Determination of Vinyl Acetate Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org. , Nicolet 20 S B, available from Nicolet Instrument Corp., Analytical Division, 5225 Verona Rd., Madison, WI 53711-4495, and Perkin Elmer 1760, a registered trademark of Perkin-Elmer Corp., 761 Main Ave., Norwalk, CT 06859-0156, or equivalents, have been found suitable for this purpose.
ICS Number Code 83.080.20 (Thermoplastic materials)
UNSPSC Code 13102000(Thermoplastic plastics)