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ASTM International - ASTM D2238-92(2004)

Standard Test Methods for Absorbance of Polyethylene Due to Methyl Groups at 1378 cm

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Organization: ASTM International
Publication Date: 1 July 2004
Status: inactive
Page Count: 7
ICS Code (Thermoplastic materials): 83.080.20
significance And Use:

When interpreted with the aid of appropriate calibration data, either test method can be used to compare the total methyl contents of polyethylenes made by similar processes. Such information can... View More

scope:

1.1 These test methods cover measurement by infrared absorption spectrophotometry of the 1378.4-cm1 (7.255-m) band in polyethylene due to methyl groups. (1, 2, 4-7) Two test methods are covered:

1.1.1 Test Method A uses compensation with a standard sample film or wedge of known methyl content.

1.1.2 Test Method B uses compensation with a wedge of polymethylene or a polyethylene of known low methyl content.

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).

Note 1-For determination of density, see Specifications D 1248.

Note 2-In cases of Type III polyethylene with densities greater than 0.950 g/cm3, different results are obtained with the two test methods.

1.3 The values stated in SI units are to be regarded as the standard. The values given in brackets 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.

Note 3-There is no similar or equivalent ISO standard covering the subject matter of these test methods.

Document History

December 1, 2012
Standard Test Methods for Absorbance of Polyethylene Due to Methyl Groups at 1378 cm−1 (Withdrawn 2021)
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:...
ASTM D2238-92(2004)
July 1, 2004
Standard Test Methods for Absorbance of Polyethylene Due to Methyl Groups at 1378 cm
1.1 These test methods cover measurement by infrared absorption spectrophotometry of the 1378.4-cm1 (7.255-m) band in polyethylene due to methyl groups. (1, 2, 4-7) Two test methods are...
March 10, 1999
Standard Test Methods for Absorbance of Polyethylene Due to Methyl Groups at 1378 cm
1.1 These test methods cover measurement by infrared absorption spectrophotometry of the 1378.4-cm -1 (7.255[mu]m) band in polyethylene due to methyl groups. (1, 2, 4-7) Two test methods are covered:...
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