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ASTM D6188-17

Заменен
Standard Test Method for Viscosity of Cellulose by Cuprammonium Ball Fall — 7 стр.
Значение и использование

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.)

Область применения

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.

ICS
85.040 Pulps / Целлюлоза
Сборник ASTM
06.03 Paint –– Pigments, Polymers, Resins, Naval Stores, Cellulosic Esters, and Ink Vehicles / Красители – Пигменты, Быстровысыхающие масла, Полимеры, Смолы, Канифольно-скипидарные продукты, Целлюлозный полимер, Связующее вещества для красок
Тематика
Paints & Related Coatings