BS 2782-7.733A(1996) : 1996 AMD 9928

Name: BS 2782-7.733A(1996) : 1996 AMD 9928
Brand: BSI

Superseded

View Superseded by

METHODS OF TESTING PLASTICS - RHEOLOGICAL PROPERTIES - DETERMINATION OF VISCOSITY NUMBER OF POLYAMIDES

Superseded date

15-03-1998

Published date

23-11-2012

Publisher

British Standards Institution

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DevelopmentNote	Renumbered and superseded by BS EN ISO 307 Supersedes BS 2782-7.733A(1991) (09/2003)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Status	Superseded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	BS EN ISO 307 : 2007

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