ISO 307:2007

Plastics — Polyamides — Determination of viscosity number

Publication date:   May 15, 2007

95.99 Withdrawal of Standard   Apr 26, 2019

General information

95.99 Withdrawal of Standard   Apr 26, 2019

ISO

ISO/TC 61/SC 9 Thermoplastic materials

International Standard

83.080.20   Thermoplastic materials

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Scope

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.

Life cycle

PREVIOUSLY

Revises
ISO 307:2003

NOW

WITHDRAWN
ISO 307:2007
95.99 Withdrawal of Standard
Apr 26, 2019

CORRIGENDA / AMENDMENTS

Amended by
ISO 307:2007/Amd 1:2013

REVISED BY

PUBLISHED
ISO 307:2019