ASTM D6474-19
Standard Test Method for Determining Molecular Weight Distribution and Molecular Weight Averages of Polyolefins by High Temperature Gel Permeation Chromatography

Standard No.

ASTM D6474-19

Release Date

2019

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D6474-20

Latest

ASTM D6474-20

Scope

1.1 This test method covers the determination of molecular weight distributions and molecular weight averages of linear polyolefins by high temperature gel permeation chromatography (GPC). This test method uses commercially available polystyrene standards and equipment and is applicable to polyethylenes (excluding high pressure low density polyethylene–LDPE) and polypropylenes soluble in 1,2,4trichlorobenzene (TCB) at 140°C. This test method is not absolute and requires calibration. NOTE 1—Size exclusion chromatography (SEC) often is used as an alternative name for gel permeation chromatography (GPC). NOTE 2—Specific methods and capabilities of users may vary with differences in columns, instrumentation, applications software, and practices between laboratories. NOTE 3—One general method is outlined herein; alternative analytical practices can be followed and are attached in notes where appropriate. NOTE 4—There is no known ISO equivalent to this standard. 1.2 The values stated in SI units, based on IEEE/ASTM S1-10, 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. 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 D6474-19 Referenced Document

• ASTM D3016 Standard Practice for Use of Liquid Exclusion Chromatography Terms and Relationships
• ASTM D5296 Standard Test Method for Molecular Weight Averages and Molecular Weight Distribution of Polystyrene by High Performance Size-Exclusion Chromatography
• ASTM D883 Standard Terminology Relating to Plastics
• ASTM E685 Standard Practice for Testing Fixed-Wavelength Photometric Detectors Used in Liquid Chromatography
• ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• IEEE/ASTM SI 10 American National Standard for Metric Practice

ASTM D6474-19 history

• 2020 ASTM D6474-20 Standard Test Method for Determining Molecular Weight Distribution and Molecular Weight Averages of Polyolefins by High Temperature Gel Permeation Chromatography
• 2019 ASTM D6474-19 Standard Test Method for Determining Molecular Weight Distribution and Molecular Weight Averages of Polyolefins by High Temperature Gel Permeation Chromatography
• 2012 ASTM D6474-12 Standard Test Method for Determining Molecular Weight Distribution and Molecular Weight Averages of Polyolefins by High Temperature Gel Permeation Chromatography
• 1999 ASTM D6474-99(2006) Standard Test Method for Determining Molecular Weight Distribution and Molecular Weight Averages of Polyolefins by High Temperature Gel Permeation Chromatography
• 1999 ASTM D6474-99 Standard Test Method for Determining Molecular Weight Distribution and Molecular Weight Averages of Polyolefins by High Temperature Gel Permeation Chromatography