GB/T 12006.1-2009
Plastic.Polyamides.Part 1:Determination of viscosity number (English Version)

Standard No.

GB/T 12006.1-2009

Language

Chinese, Available in English version

Release Date

2009

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB/T 12006.1-2009

Replace

GB/T 12006.1-1989

Scope

This part of GB/T 12006 specifies the method for the determination of the viscosity of dilute solutions of polyamides in certain specified solvents. Polyamide samples should be completely dissolved in the chosen solvent. Additives such as flame retardants and modifiers often affect the viscosity test. In formic acid, the viscosity will be higher, and in sulfuric acid, the viscosity will be lower. The degree of influence on polyamide compounds depends on conditions such as additives, additive levels, some other additives present and formulation. For pure polyamides or polyamides containing additives that have no effect on the viscosity test, the determination of the viscosity number provides a method for determining the molecular weight of the polymer. Pure polyamides or polyamides containing additives that have no effect on the viscosity test, the viscosity number can be switched from one solvent to another. For polyamides containing additives which affect the viscosity test, the viscosity number shall indicate the solvent used and the composition of the material. In this case, the viscosity number determination cannot be converted from one solvent to another. This method is applicable to PA46, PA6, PA66, PA69, PA610, PA612, PAll, PA12, PA6T/66, PA6I/6T, PA6T/6I/66, PA6T/61, PA6I/6T/66 named according to ISO 1874-1 Polyamides with PA MXD6, copolyamides, polyamide compounds and other polyamides that are soluble in a specified solvent under specified conditions. This method is not applicable to polyamides produced by the anionic polymerization of lactams or by cross-linking agents, which are generally insoluble in the specified solvents. The viscosity number is determined according to the specific conditions specified in this part and the general procedures specified in GB/T 1632.1-2008.

GB/T 12006.1-2009 Referenced Document

• ASTM D789 Standard Test Methods for Determination of Relative Viscosity and Moisture Content of Polyamide (PA)
• GB/T 1632.1-2008 Plastics.Determination of the viscosity of polymers in dilute solution using capillary viscometers.Part 1:General principles
• GB/T 9345.4-2008 Plastics.Determination of ash.Part4:Polyamides
• ISO 1042:1998 Laboratory glassware - One-mark volumetric flasks
• ISO 15512 Plastics — Determination of water content*， 2019-04-30 Update
• ISO 1874-1 Plastics - Polyamide (PA) moulding and extrusion materials - Part 1: Designation system and basis for specification*， 2010-11-15 Update
• ISO 3105 Glass capillary kinematic viscometers - Specifications and operating instructions
• JIS K 6920-2:2000 Plastics -- Polyamide (PA) moulding and extrusion materials -- Part 2: Preparation of test specimens and determination of properties

GB/T 12006.1-2009 history

• 2009 GB/T 12006.1-2009 Plastic.Polyamides.Part 1:Determination of viscosity number
• 1989 GB/T 12006.1-1989 Polyamides--Determination of viscosity number

GB/T 12006.1-2009 -All Parts