ASTM D3591-22

ASTM D3591-22

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

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Détails

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.


Significance and Use:

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.

Informations supplémentaires

Auteur American Society for Testing and Materials (ASTM International)
Comité D20.70 - Committee D20 on Plastics
Edité par ASTM
Type de document Norme
Thème ,Thermoplastic materials
ICS 83.080.20 : Matériaux thermoplastiques
Nombre de pages 4
Remplace ASTM D3591-17
Recueil ASTM Volume 08.02 - Multi-User - Single-Site Online
Mot-clé D3591

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