ISO 307:2007 塑料 聚酰胺 粘度值的测定

标准编号：ISO 307:2007

中文名称：塑料 聚酰胺 粘度值的测定

英文名称：Plastics — Polyamides — Determination of viscosity number

发布日期：2007-05

标准范围

ISO 307:2007规定了聚酰胺稀溶液在特定溶剂中粘度值的测定方法。对于不干扰粘度测量的纯聚酰胺或含有添加剂的聚酰胺，聚酰胺粘度值的测定提供了聚合物分子质量的测量。纯聚酰胺或含有不干扰粘度测量的添加剂的聚酰胺的粘度值可以从一种溶剂转换为另一种溶剂。含有干扰粘度测量的添加剂的聚酰胺的粘度值取决于所用溶剂和材料组成。在这种情况下，测得的粘度值不能从一种溶剂转换为另一种溶剂。该方法适用于指定为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和PA MXD6的聚酰胺，以及在规定条件下可溶于规定溶剂之一的共聚酰胺、聚酰胺化合物和其他聚酰胺。本方法不适用于内酰胺阴离子聚合或交联剂生产的聚酰胺；这种聚酰胺通常不溶于规定的溶剂。

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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