ASTM D6645-18 PDF

Scope: 1.1 This test method covers the determination of methyl groups (that is, comonomer content) in polyethylenes by infrared spectrophotometry. The test method is applicable to copolymers of ethylene with 1-butene, 1-hexene, or 1-octene having densities above 900 kg/m3 . High-pressure low-density polyethylenes (LDPE) and terpolymers are excluded. 1.2 The values stated in SI units, based on IEEE/ASTM SI10, are to be regarded as the standard. 1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. NOTE 1—There is no known ISO equivalent to this standard. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM D6645-18 Referenced Document

ASTM D1505 Standard Test Method for Density of Plastics by the Density-Gradient Technique
ASTM D2238 Standard Test Methods for Absorbance of Polyethylene Due to Methyl Groups at 1378 cm^minus;1
ASTM D3124 Standard Test Method for Vinylidene Unsaturation in Polyethylene by Infrared Spectrophotometry*， 2019-11-01 Update
ASTM D5576 Standard Practice for Determination of Structural Features in Polyolefins and Polyolefin Copolymers by Infrared Spectrophotometry (FT-IR)*， 2021-01-15 Update
ASTM D792 Standard Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
ASTM E131 Standard Definitions of Terms and Symbols Relating to Molecular Spectroscopy
ASTM E1421 Standard Practice for Describing and Measuring Performance of Fourier Transform Mid-Infrared (FT-MIR) Spectrometers: Level Zero and Level One Tests*， 2021-09-01 Update
ASTM E168 Standard Practices for General Techniques of Infrared Quantitative Analysis
ASTM E177 Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
ASTM E932 Standard Practice for Describing and Measuring Performance of Dispersive Infrared Spectrometers*， 2021-04-01 Update
IEEE/ASTM SI 10 American National Standard for Metric Practice

2018 ASTM D6645-18 Standard Test Method for Methyl (Comonomer) Content in Polyethylene by Infrared Spectrophotometry
2018 ASTM D6645-08 Standard Test Method for Methyl (Comonomer) Content in Polyethylene by Infrared Spectrophotometry
2001 ASTM D6645-01(2010) Standard Test Method for Methyl (Comonomer) Content in Polyethylene by Infrared Spectrophotometry
2001 ASTM D6645-01 Standard Test Method for Methyl (Comonomer) Content in Polyethylene by Infrared Spectrophotometry