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ASTM D6188-17

Current Revision

Standard Test Method for Viscosity of Cellulose by Cuprammonium Ball Fall

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1.1 This test method describes the procedure for estimating the molecular weight of cellulose by determining the viscosity of cuprammonium (CuAm) solutions of cellulosic materials, such as wood pulp, cotton, and cotton linters. This test method is suitable for rapid, routine testing of large numbers of samples with high accuracy and precision. This test method updates and extends the procedure reported by the American Chemical Society (ACS).2

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

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.

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.


5.1 This test method is suitable for use as a rapid control test for pulp manufacture or for careful determination of the viscometric molecular weight of purified cotton or wood derived pulps.

5.2 This test method is applicable over a very large range of cellulose molecular weights because seven sample sizes are defined. (Sample weights are reduced as cellulose molecular weight increases.)

5.3 Cotton and high molecular weight pulps may be difficult to dissolve. (Warning—This test method is only valid if the sample dissolves completely without gels.)

SDO ASTM: ASTM International
Document Number D6188
Publication Date June 1, 2017
Language en - English
Page Count 7
Revision Level 17
Supercedes
Committee D01.36
Publish Date Document Id Type View
June 1, 2017 D6188-17 Revision
June 1, 2008 D6188-97R08 Revision
Nov. 10, 1997 D6188-97 Revision
June 1, 2022 D6188-17R22 Reaffirmation
May 10, 2003 D6188-97R03 Reaffirmation