NF EN ISO 307

NF EN ISO 307

December 2007
Standard Cancelled

Plastics - Polyamides - Determination of viscosity number

ISO 307:2007 specifies a method for the determination of the viscosity number of dilute solutions of polyamides in certain specified solvents. For pure polyamides or polyamides containing additives that do not interfere with the viscosity measurement, the determination of the viscosity number of a polyamide provides a measure of the molecular mass of the polymer. The viscosity number of pure polyamides or polyamides which contain additives that do not interfere with the viscosity measurement can be converted from one solvent to another.The viscosity number of polyamides containing additives that do interfere with the viscosity measurement is specific to the solvent used and the material composition. In this case, the measured viscosity number cannot be converted from one solvent to another. The method is applicable to the polyamides designated PA 46, PA 6, PA 66, PA 69, PA 610, PA 612, PA 11, PA 12, PA 6T/66, PA 6I/6T, PA 6T/6I/66, PA 6T/6I, PA 6I/6T/66 and PA MXD6, as well as to copolyamides, compounds of polyamides and other polyamides that are soluble in one of the specified solvents under the specified conditions.The method is not applicable to polyamides produced by anionic polymerization of lactams or produced with cross-linking agents; such polyamides are normally insoluble in the specified solvents.

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National standards and national normative documents

Publication date

December 2007

Number of pages

41 p.

Reference

NF EN ISO 307

ICS Codes

83.080.20   Thermoplastic materials

Classification index

T51-173

Print number

1 - 18/01/2008

International kinship

ISO 307:2007

European kinship

EN ISO 307:2007
Sumary
Plastics - Polyamides - Determination of viscosity number

ISO 307:2007 specifies a method for the determination of the viscosity number of dilute solutions of polyamides in certain specified solvents.

For pure polyamides or polyamides containing additives that do not interfere with the viscosity measurement, the determination of the viscosity number of a polyamide provides a measure of the molecular mass of the polymer. The viscosity number of pure polyamides or polyamides which contain additives that do not interfere with the viscosity measurement can be converted from one solvent to another.

The viscosity number of polyamides containing additives that do interfere with the viscosity measurement is specific to the solvent used and the material composition. In this case, the measured viscosity number cannot be converted from one solvent to another.

The method is applicable to the polyamides designated PA 46, PA 6, PA 66, PA 69, PA 610, PA 612, PA 11, PA 12, PA 6T/66, PA 6I/6T, PA 6T/6I/66, PA 6T/6I, PA 6I/6T/66 and PA MXD6, as well as to copolyamides, compounds of polyamides and other polyamides that are soluble in one of the specified solvents under the specified conditions.

The method is not applicable to polyamides produced by anionic polymerization of lactams or produced with cross-linking agents; such polyamides are normally insoluble in the specified solvents.

Replaced standards (1)
NF EN ISO 307
April 2004
Standard Cancelled
Plastics - Polyamides - Determination of viscosity number

ISO 307:2003 specifies a method for the determination of the viscosity number (also referred to as reduced viscosity) of dilute solutions of polyamides in certain specified solvents. The method is applicable to the polyamides designated PA 46, PA 6, PA 66, PA 69, PA 610, PA 612, PA 11, PA 12, PA 6T/66 and PA MXD6 as defined in ISO 1874-1, as well as to copolyamides and other polyamides that are soluble in one of the specified solvents under the specified conditions. The method is not applicable to polyamides produced by anionic polymerization of lactams or produced with crosslinking agents; such polyamides are normally insoluble in the specified solvents.

Standard replaced by (1)
NF EN ISO 307
May 2019
Standard Current
Plastics - Polyamides - Determination of viscosity number

This document specifies a method for the determination of the viscosity number of dilute solutions of polyamides in certain specified solvents. The method is applicable to the polyamides designated PA 46, PA 6, PA 66, PA 69, PA 610, PA 612, PA 11, PA 12, PA 6T/66, PA 6I/6T, PA 6T/6I/66, PA 6T/6I, PA 6I/6T/66 and PA MXD6 as defined in ISO 16396-1, as well as to copolyamides, compounds of polyamides and other polyamides that are soluble in one of the specified solvents under the specified conditions. The method is not applicable to polyamides produced by anionic polymerization of lactams or produced with cross-linking agents; such polyamides are normally insoluble in the specified solvents. The viscosity number is determined by the general procedure specified in ISO 1628‑1, observing the particular conditions specified in this document.

Table of contents
  • Avant-propos
    iv
  • Introduction
    v
  • 1 Domaine d'application
    1
  • 2 Références normatives
    2
  • 3 Termes et définitions
    2
  • 4 Principe
    3
  • 5 Réactifs et produits
    3
  • 5.1 Solvants et réactifs
    3
  • 5.2 Liquides de nettoyage
    5
  • 6 Appareillage
    5
  • 7 Préparation des échantillons pour essai
    6
  • 7.1 Généralités
    6
  • 7.2 Échantillons contenant moins de 98 % (fraction massique) de polyamide
    6
  • 8 Calcul de la masse de la prise d'essai
    6
  • 9 Choix du solvant
    7
  • 10 Mode opératoire
    7
  • 10.1 Nettoyage du viscosimètre
    7
  • 10.2 Préparation de la solution d'essai
    8
  • 10.3 Mesurage du temps d'écoulement
    9
  • 11 Expression des résultats
    10
  • 12 Répétabilité et reproductibilité
    11
  • 13 Relation entre l'indice de viscosité déterminé dans une solution d'acide sulfurique à 96 (fraction massique) et la viscosité relative déterminée dans différents autres solvants
    11
  • 14 Rapport d'essai
    12
  • Annexe A (informative) Détermination de la concentration de l'acide sulfurique commercial (95 à 98 %) et ajustement à 96 % par titrage
    14
  • Annexe B (informative) Détermination de la concentration de l'acide sulfurique (95 % à 98 %) et ajustement à 96 % par mesurage du temps d'écoulement dans un petit viscosimètre capillaire
    17
  • Annexe C (informative) Détermination de la concentration de l'acide formique commercial et ajustement à 90 % par titrage
    19
  • Annexe D (informative) Détermination de la concentration de l'acide formique commercial à 90 % par mesurage de la masse volumique
    21
  • Annexe E (informative) Relation entre l'indice de viscosité déterminé dans une solution d'acide sulfurique à 96 % (fraction massique) et la viscosité déterminée dans différents solvants
    24
  • Bibliographie
    33
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