Standard Historical Last Updated: Oct 30, 2018 Track Document
ASTM D6645-01(2010)

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

Standard Test Method for Methyl (Comonomer) Content in Polyethylene by Infrared Spectrophotometry D6645-01R10 ASTM|D6645-01R10|en-US Standard Test Method for Methyl (Comonomer) Content in Polyethylene by Infrared Spectrophotometry Standard new BOS Vol. 08.03 Committee D20
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Significance and Use

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.

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 , 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 1—There is no known ISO equivalent to this standard.

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Details
Book of Standards Volume: 08.03
Developed by Subcommittee: D20.70
Pages: 4
DOI: 10.1520/D6645-01R10
ICS Code: 19.100; 83.080.20