ASTM-D6579 › Historical Revision Information
Standard Practice for Molecular Weight Averages and Molecular Weight Distribution of Hydrocarbon, Rosin and Terpene Resins by Size-Exclusion Chromatography
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Scope
1.1 This practice covers the determination of molecular weight (MW) averages and the molecular weight distribution (MWD) for soluble hydrocarbon and terpene resins by size-exclusion chromatography (SEC). This technique is not absolute; it requires calibration with standards of known molecular weight. This practice is applicable for samples containing molecular weight components that have elution volumes falling within the elution volume range defined by polystyrene standards.
Note 1-The SEC is also known as gel permeation chromatography (GPC).
1.2 The SEC systems employ low-volume liquid chromatography components and columns packed with relatively small (generally 3 to 20 m) microporous particles. High-performance liquid chromatography instrumentation and automated data handling systems for data acquisition and processing are also required.
1.3
Keywords
hydrocarbon resins; molecular weight average; molecular weight distribution; polydispersity; polystyrene standards; size exclusion chromatography (SEC); terpene resins; ICS Number Code 83.080.20 (Thermoplastic materials)
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83.080.20 (Thermoplastic materials)
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Document Number
ASTM-D6579-11R20
Revision Level
2011 R20 EDITION
Status
Current
Modification Type
New
Publication Date
July 3, 2020
Document Type
Practice
Page Count
8 pages
Committee Number
D01.34