ASTM-D6579 2006

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D6579-06 Standard Practice for Molecular Weight Averages and Molecular Weight Distribution of Hydrocarbon and Terpene Resins by Size-Exclusion Chromatography

Published By	Publication Date	Number of Pages
ASTM	2006	7

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Categories: 83.080.20 - Thermoplastic materials, ASTM

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Description

1.1 This practice covers the determination of apparent molecular weight (MW) averages and molecular weight distributions (MWD) for THF-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 to resins containing molecular-weight components that have elution volumes falling within the elution volume range defined by polystyrene standards.

Note 1

SEC is also known as gel permeation chromatography (GPC).

1.2 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 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

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.

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Terminology Summary of Practice Significance and Use Apparatus
2	Reagents and Materials Preparation of Apparatus
3	Preparation of Solutions FIG. 1
4	Performance Requirements Calibration
5	FIG. 2
6	Procedure Calculation Report Keywords FIG. 3 FIG. 4
7	X1. DEFINITIONS OF MOLECULAR WEIGHT AVERAGES X1.1 Number average of molecular weight, (Mn) X1.2 Weight average molecular weight, (Mw) X1.3 Z-average molecular weight, (Mz) X1.4

Additional information

Standard Title	D6579-06 Standard Practice for Molecular Weight Averages and Molecular Weight Distribution of Hydrocarbon and Terpene Resins by Size-Exclusion Chromatography
Published Code	ASTM
Publication Date	2006
Pages Count	7
ICS Codes	83.080.20 - Thermoplastic materials

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ASTM-D6579 2006

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