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.
EN ISO 307:2019 history
2019EN ISO 307:2019 Plastics - Polyamides - Determination of viscosity number (ISO 307:2019)
2013EN ISO 307:2007/A1:2013 Plastics - Polyamides - Determination of viscosity number - Amendment 1: Corrections, and update to reference to JIS K 6920-2 (ISO 307:2007/Amd 1:2013)
2007EN ISO 307:2007 Plastics - Polyamides - Determination of viscosity number (ISO 307:2007)
2003EN ISO 307:2003 Plastics - Polyamides - Determination of viscosity number ISO 307: 2003
1997EN ISO 307:1997 Plastics - Polyamides - Determination of Viscosity Number ISO 307: 1994