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Withdrawn Rationale:
These test methods cover measurement by infrared absorption spectrophotometry of the 1378.4-cm−1 (7.255-μm) band in polyethylene due to methyl groups.
Formerly under the jurisdiction of Committee D20 on Plastics, these test methods were withdrawn in January 2021 in accordance with section 10.6.3 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.
1. Scope
1.1 These test methods cover measurement by infrared absorption spectrophotometry of the 1378.4-cm−1 (7.255-μm) band in polyethylene due to methyl groups. (1, 2, 4-7)2 Two test methods are covered:
1.2 These test methods are applicable to polyethylenes of Types I (density 910 to 925 kg/m3), II (density 926 to 940), and III (density 941 to 965).
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 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 hazards statements are given in Section 7.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
D618 Practice for Conditioning Plastics for Testing
D1248 Specification for Polyethylene Plastics Extrusion Materials for Wire and Cable
D1505 Test Method for Density of Plastics by the Density-Gradient Technique
D1898 Practice for Sampling of Plastics
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
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DOI: 10.1520/D2238-92R12E01
Citation Format
ASTM D2238-92(2012)e1, Standard Test Methods for Absorbance of Polyethylene Due to Methyl Groups at 1378 cm−1 (Withdrawn 2021), ASTM International, West Conshohocken, PA, 2012, www.astm.org
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