ASTM D2238-92(2012)e1 PDF

Scope: 1.1 These test methods cover measurement by infrared absorption spectrophotometry of the 1378.4-cm^-1 (7.255-祄) band in polyethylene due to methyl groups. (1, 2, 4-7)² 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?span class="note">For determination of density, see Specifications D1248.

Note 2?span class="note">In cases of ......

ASTM D2238-92(2012)e1 Referenced Document

ASTM D1248 Standard Specification for Polyethylene Plastics Molding and Extrusion Materials
ASTM D1505 Standard Test Method for Density of Plastics by the Density-Gradient Technique*， 1998-04-20 Update
ASTM D1898
ASTM D618 Standard Practice for Conditioning Plastics for Testing*， 2021-07-15 Update
ASTM E131 Standard Definitions of Terms and Symbols Relating to Molecular Spectroscopy
ASTM E168 Standard Practices for General Techniques of Infrared Quantitative Analysis*， 1999-04-20 Update
ASTM E177 Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
IEEE/ASTM SI 10 American National Standard for Metric Practice

2022 ASTM D2238-22 Standard Test Methods for Absorbance of Polyethylene Due to Methyl Groups at 1378 cm⁻¹
1992 ASTM D2238-92(2012)e1 Standard Test Methods for Absorbance of Polyethylene Due to Methyl Groups at 1378 cm^minus;1
1992 ASTM D2238-92(2004) Standard Test Methods for Absorbance of Polyethylene Due to Methyl Groups at 1378 cm
1992 ASTM D2238-92(1999) Standard Test Methods for Absorbance of Polyethylene Due to Methyl Groups at 1378 cm