Wir benötigen Ihre Einwilligung zur Verwendung der einzelnen Daten, damit Sie unter anderem Informationen zu Ihren Interessen einsehen können. Klicken Sie auf "OK", um Ihre Zustimmung zu erteilen.
Standard Test Method for Viscosity of Cellulose by Cuprammonium Ball Fall
Name übersetzen
NORM herausgegeben am 1.6.2017
Bezeichnung normen: ASTM D6188-17
Anmerkung: UNGÜLTIG
Ausgabedatum normen: 1.6.2017
SKU: NS-686360
Zahl der Seiten: 7
Gewicht ca.: 21 g (0.05 Pfund)
Land: Amerikanische technische Norm
Kategorie: Technische Normen ASTM
Keywords:
ball fall viscosity, cellulose, cuprammonium, DP, molecular weight, process control, viscosity,, ICS Number Code 85.040 (Pulps)
Significance and Use | ||||||
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.) |
||||||
1. Scope | ||||||
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. |
||||||
2. Referenced Documents | ||||||
|
Bereitstellung von aktuellen Informationen über legislative Vorschriften in der Sammlung der Gesetze bis zum Jahr 1945.
Aktualisierung 2x pro Monat!
Brauchen Sie mehr Informationen? Sehen Sie sich diese Seite an.
Letzte Aktualisierung: 2024-05-03 (Zahl der Positionen: 2 896 946)
© Copyright 2024 NORMSERVIS s.r.o.