ISO 307
Plastics - Polyamides - Determination of viscosity number
Organization: | ISO |
Publication Date: | 15 May 1984 |
Status: | inactive |
Page Count: | 10 |
ICS Code (Thermoplastic materials): | 83.080.20 |
scope:
Scope and field of application
This International Standard 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 6, PA 66, PA 69, PA 610, PA 612, PA 6(3)T, PA 11 and PA 12, as defined in ISO 187411, 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. The viscosity number is determined by the general procedure specified in ISO 162811, observing the particular conditions specified in this International Standard.
The determination of the viscosity number of a polyamide provides a measure of the relative molecular mass of the polymer.
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