DIN EN ISO 307-2007
塑料.聚酰胺.粘度值的测定(ISO 307-2007)

Plastics - Polyamides - Determination of viscosity number (ISO 307:2007); English version of DIN EN ISO 307:2007-08

DIN EN ISO 307-2007 发布历史

This International Standard specifies a method for the determination of the viscosity number of dilute solutions of polyamides in certain specified solvents. Polyamide samples must be completely soluble in the solvents mentioned. Additives such as fiame-retardants and modifiers often interfere with the viscosity measurement, having an increasing effect on the viscosity number in formic acid and a decreasing effect on the viscosity number in sulfuric acid. The extent of the effect for polyamide compounds depends on the additive, the quantity of the additive, the presence of other additives and the compounding conditions. 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 61/6T, PA 6T/61/66, PA 6T/61, PA 61/6T/66 and PA MXD6 as defined in ISO 1874-1, 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 International Standard.

DIN EN ISO 307-2007由德国标准化学会 DE-DIN 发布于 2007-08。

DIN EN ISO 307-2007 在中国标准分类中归属于: G31 合成树脂、塑料基础标准与通用方法，在国际标准分类中归属于: 83.080.20 热塑性塑料。

DIN EN ISO 307-2007的历代版本如下：

• 2007年08月 DIN EN ISO 307-2007 塑料.聚酰胺.粘度值的测定(ISO 307-2007)
• 2013年08月 DIN EN ISO 307-2013 塑料.聚酰胺.粘度值的测定(ISO 307-2007+Amd 1-2013).德文版本EN ISO 307-2007+A1-2013

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标准号

DIN EN ISO 307-2007

发布日期

2007年08月

实施日期

废止日期

无

中国标准分类号

G31

国际标准分类号

83.080.20

发布单位

DE-DIN

代替标准

DIN EN ISO 307-2013

适用范围

This International Standard specifies a method for the determination of the viscosity number of dilute solutions of polyamides in certain specified solvents. Polyamide samples must be completely soluble in the solvents mentioned. Additives such as fiame-retardants and modifiers often interfere with the viscosity measurement, having an increasing effect on the viscosity number in formic acid and a decreasing effect on the viscosity number in sulfuric acid. The extent of the effect for polyamide compounds depends on the additive, the quantity of the additive, the presence of other additives and the compounding conditions. 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 61/6T, PA 6T/61/66, PA 6T/61, PA 61/6T/66 and PA MXD6 as defined in ISO 1874-1, 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 International Standard.