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ASTM D3591-22

Current Revision

Standard Test Method for Determining Logarithmic Viscosity Number of Poly(Vinyl Chloride) (PVC) in Formulated Compounds

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1.1 This test method covers the determination of the logarithmic viscosity number of poly(vinyl chloride) (PVC) homopolymers after compounding or processing.

1.2 It is the basic assumption of this technique that the formulation of the compounded resin is known and that any additives present can be separated from the resin by extraction with diethyl ether. This is necessary to permit adjustment of the amount of sample used in the test to give a resin concentration in cyclohexanone of 0.2 ± 0.002 g/100 mL.

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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in 7.3 and 8.4.1.

Note 1: This test method and ISO 1628-2 are not equivalent.

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 The logarithmic viscosity number provides information on the effect of compounding or processing of PVC.

5.2 Exposure of PVC compositions to shear or to high temperatures can result in a change in the logarithmic viscosity number of the resin.

SDO ASTM: ASTM International
Document Number D3591
Publication Date Sept. 1, 2022
Language en - English
Page Count 4
Revision Level 22
Supercedes
Committee D20.70
Publish Date Document Id Type View
Sept. 1, 2022 D3591-22 Revision
Dec. 1, 2017 D3591-17 Revision
Jan. 10, 1997 D3591-97 Revision
Feb. 1, 2011 D3591-97R11 Reaffirmation
March 10, 2003 D3591-97R03 Reaffirmation