ASTM D2364-15(R2021) pdf free download
ASTM D2364-15(R2021) pdf free download.Standard Test Methods for Hydroxyethylcellulose
1. Scope
1.1 These test methods cover the testing of hydroxyethyl- cellulose. 1.2 The test procedures appear in the following order:1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.4 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 appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.5 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
3. Purity of Reagents
3.1 Reagent grade chemicals shall be used in all tests. Unless otherwise indicated, it is intended that all reagents shall conform to the specifications of the Committee on Analytical Reagents of the American Chemical Society, 3 where such specifications are available. Other grades may be used, pro- vided it is first ascertained that the reagent is of sufficiently high purity to permit its use without lessening the accuracy of the determination. 3.2 Unless otherwise indicated, reference to water shall be understood to mean reagent water, conforming to Specification D1193. MOISTURE
4. Scope
4.1 This test method covers the determination ofthe volatile content of hydroxyethylcellulose.
5. Significance and Use
5.1 The results of this test are used for calculating the total solids in the sample; and, by common usage, all materials volatile at this test temperature are designated as moisture. 5.2 Moisture analysis (along with sulfated ash) is a measure of the amount of active polymer in the material and must be considered when determining the amount of hydroxyethyl cellulose to use in various formulations.
6. Apparatus
6.1 Oven, gravity-convection, capable of maintaining a temperature of 105 6 3°C. 6.2 Weighing Bottles, low-form, 50 mm in inside diameter by 30 mm in height, or equivalent. 6.3 Analytical Balance.
7. Procedure
7.1 Weigh 5 g ofsample to the nearest 0.001 g in a tared and covered weighing bottle.
18. Scope
18.1 This test method is an arbitrary method of determining the viscosity of aqueous solutions of hydroxyethylcellulose in the viscosity range from 10 to 10 000 mPa·s (cP) at 25°C. 18.2 The concentration to be used for the test shall be agreed upon between the purchaser and the seller. It shall be such that the viscosity of the solution will fall within the range of this test. 18.3 The results for the viscosity of hydroxyethylcellulose by this test method will not necessarily agree with results from other types of instruments used for viscosity measurements. 18.4 The determinations are run on a calculated dry basis; that is, the amount of hydroxyethylcellulose required for the desired concentration on a dry basis is calculated from the known moisture content.
19. Significance and Use
19.1 This test method is intended for referee purposes. 19.2 This test method determines the relative ability of the polymer to thicken aqueous solutions and is therefore related to the concentration required in various formulations to achieve the desired finished product viscosity. 20. Apparatus 20.1 Viscometer, Coaxial Rotational—The essential instru- mentation required providing the minimum rotational viscom- eter analytical capabilities for this method include: N OTE 1—Manufacturers of cellulose derivatives usually specify the viscometer make, model, spindle, and speed to be used with their products. It is highly recommended that these specifications be followed. Use of a viscometer made by another company or even a different model by the same company may result in slightly different results. 20.1.1 A drive motor to apply a unidirectional rotational displacement to the specimen at a rate from 0.5 to 60 r/min constant to within 61 %.
