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Description of ASTM-D6474 2012ASTM D6474-12Historical Standard: Standard Test Method for Determining Molecular Weight Distribution and Molecular Weight Averages of Polyolefins by High Temperature Gel Permeation ChromatographyASTM D6474Scope 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 1,2,4-trichlorobenzene (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 and health practices and determine the applicability of regulatory limitations prior to use. Keywords gel permeation chromatography; molecular weight average; molecular weight distribution; polyolefin; size exclusion chromatography ICS Code ICS Number Code 83.080.20 (Thermoplastic materials) DOI: 10.1520/D6474-12 The following editions for this book are also available...This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
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