BS 2782-7.733A(1996) : 1996 AMD 9928
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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METHODS OF TESTING PLASTICS - RHEOLOGICAL PROPERTIES - DETERMINATION OF VISCOSITY NUMBER OF POLYAMIDES
15-03-1998
23-11-2012
Committees responsible
National foreword
method
1 Scope
2 Normative references
3 Definitions
4 Principle
5 Reagents and materials
6 Apparatus
7 Preparation of test samples
8 Calculation of mass test portion
9 Selection of solvent
10 Procedure
11 Expression of results
12 Repeatability and reproducibility
13 Interconversion of the viscosity numbers determined in
different solvents and interconversion of viscosity numbers
determined in 96% sulfuric acid and relative viscosities
determined in accordance with ASTM D 789
14 Test report
Annex
A (normative) Determination of the concentration of commercial
sulfuric acid (95% to 97%) and adjustment to 96,0%
Tables
1 Determination of additives in polyamide samples in order to
be able to calculate the correct test portion size
2 Repeatability and reproducibility
3 Interconversion of relative viscosity (RV) and viscosity
number (VN) for PA 6 and PA 66
Figures
1 Ubbelohde viscometer
2 Calibration lines for the interconversion of the viscosity
numbers of PA 6, PA 66, PA 69 and PA 610 in 90% (m/m) formic
acid solution and in 96% (m/m) sulfuric acid solution
3 Calibration line for the interconversion of the viscosity
numbers of PA 612 96% (m/m) sulfuric acid solution in
m-cresol
4 Interconversion of relative viscosity and viscosity number
for PA 6 and PA 66
Gives a method for determining the viscosity number of dilute solutions of polyamides in certain specified solvents. Applies to PA 6, PA 66, PA 69, PA 610, PA 612, PA 11, PA 12 and PA MXD6, in addition to copolyamides and other polyamides that are soluble in one of the specified solvents under specified conditions. Does not apply to polyamides produced by anionic polymerization of lactams or produced with crosslinking agents. BS AMD 9928 RENUMBERS THIS STANDARD
| Committee |
PRI/21
|
| DevelopmentNote |
Renumbered and superseded by BS EN ISO 307 Supersedes BS 2782-7.733A(1991) (09/2003)
|
| DocumentType |
Standard
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy |
| Standards | Relationship |
| ISO 307:2007 | Identical |
| ISO 599:1985 | Plastics Polyamide homopolymers Determination of matter extractable by boiling methanol |
| ISO 1628-1:2009 | Plastics Determination of the viscosity of polymers in dilute solution using capillary viscometers Part 1: General principles |
| ISO 1874-1:2010 | Plastics Polyamide (PA) moulding and extrusion materials Part 1: Designation system and basis for specification |
| ISO 6427:2013 | Plastics — Determination of matter extractable by organic solvents (conventional methods) |
| ISO 1042:1998 | Laboratory glassware — One-mark volumetric flasks |
| ISO 472:2013 | Plastics — Vocabulary |
| ISO 960:1988 | Plastics — Polyamides (PA) — Determination of water content |
| ISO 3105:1994 | Glass capillary kinematic viscometers — Specifications and operating instructions |
| ISO 3451-4:1998 | Plastics — Determination of ash — Part 4: Polyamides |
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