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  • ASTM
    D1795-13 Standard Test Method for Intrinsic Viscosity of Cellulose
    Edition: 2013
    $103.58
    Unlimited Users per year

Description of ASTM-D1795 2013

ASTM D1795 - 13

Standard Test Method for Intrinsic Viscosity of Cellulose

Active Standard ASTM D1795 | Developed by Subcommittee: D01.36

Book of Standards Volume: 06.03




ASTM D1795

Significance and Use

4.1 This test is a sensitive measure of the degradation of cellulose resulting from the action of heat, light, acids, alkalies, oxidizing and reducing agents, and the like, used in its processing or purification. The intrinsic viscosity value may be converted to degree of polymerization ( DP ) or to intrinsic fluidity, if desired.

4.2 Solutions of cellulose are not Newtonian liquids; that is, their viscosity depends upon the rate-of-shear or velocity gradient during measurement. This effect is smaller for samples of low molecular mass ( DP ) and at low concentrations than for high- DP samples and at high concentrations. For the celluloses and concentrations included within the limits set forth in this test method, the effect of rate-of-shear is assumed to be negligible for referee purposes. For other conditions and for research purposes this assumption may be invalid, but to discuss ways of accounting for this effect is beyond the scope of the present test method.

1. Scope

1.1 This test method covers the determination of the intrinsic viscosity of purified celluloses such as bleached wood pulps, cotton linters, and regenerated cellulose. It is applicable to all cellulose samples with an intrinsic viscosity of 15 dl/g or less. Most native (unpurified) celluloses have intrinsic viscosity values too high for measurement by this test method.

Note 1 The use of cuprammonium hydroxide solution for regular viscosity determination is described in Method T?206 m-55 of the Technical Association of Pulp and Paper Industry on Cuprammonium Disperse Viscosity of Pulp, and Joint Army-Navy Specifications JAN-C-206.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

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.


2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D445 Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)

D629 Test Methods for Quantitative Analysis of Textiles

E2251 Specification for Liquid-in-Glass ASTM Thermometers with Low-Hazard Precision Liquids


Keywords

cellulose; intrinsic viscosity;


ICS Code

ICS Number Code 85.040 (Pulps)


DOI: 10.1520/D1795

ASTM International is a member of CrossRef.

ASTM D1795

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