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

Standard No.
ASTM D6645-01(2010)
Release Date
2001
Published By
American Society for Testing and Materials (ASTM)
Status
Replace By
ASTM D6645-08
Latest
ASTM D6645-18
Scope

This method determines the number of branches (that is, comonomer content) in copolymers of ethylene with 1-butene, 1-hexene or 1-octene. This information can be correlated with physical properties such as melting point, density, and stiffness, all of which depend on the degree of crystallinity of the polymer. Differences in the comonomer content thus may have a significant effect on the final properties of products made from these resins.

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 , 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 and health practices and determine the applicability of regulatory limitations prior to use.

Note 18212;There is no known ISO equivalent to this standard.

ASTM D6645-01(2010) Referenced Document

  • ASTM D1505 Standard Test Method for Density of Plastics by the Density-Gradient Technique
  • ASTM D1898 
  • ASTM D2238 Standard Test Methods for Absorbance of Polyethylene Due to Methyl Groups at 1378 cmminus;1
  • ASTM D3124 Standard Test Method for Vinylidene Unsaturation in Polyethylene by Infrared Spectrophotometry
  • ASTM D5576 Standard Practice for Determination of Structural Features in Polyolefins and Polyolefin Copolymers by Infrared Spectrophotometry (FT-IR)
  • 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
  • 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
  • IEEE/ASTM SI 10 American National Standard for Metric Practice

ASTM D6645-01(2010) history

  • 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
Standard Test Method for Methyl (Comonomer) Content in Polyethylene by Infrared Spectrophotometry



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