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BS 2782-1.130D(1993) : 1993 AMD 13567

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

METHODS OF TESTING PLASTICS - THERMAL PROPERTIES - DETERMINATION OF THE THERMAL STABILITY OF POLYVINYL CHLORIDE BY THE POTENTIOMETRIC METHOD
Superseded date

25-02-2002

Published date

23-11-2012

National foreword
Committees responsible
Method
1. Scope
2. Normative references
3. Definition
4. Principle
5. Reagents
6. Apparatus
7. Preparation of test samples
8. Number of tests
9. Temperatures for dehydrochlorination
10. Test procedure
11. Expression of results
12. Precision
13. Test report
Annexes
A. (informative) Cleaning of the apparatus
B. (informative) Examples of specific electrodes and
     their calibration
Table
1. Stability times obtained by three laboratories on
     three PVC samples by the pCl and the pH methods
Figures
1. General arrangement of apparatus
2. Cell A (re-usable) for dehydrochlorination of PVC
     samples
3. Cell B (disposable) for dehydrochlorination of PVC
     samples
4. Tubes for connecting the dehydrochlorination cell
     to the measurement cell
5. Expansion joint for connection on each side of
     cell B
6. Example of a suitable measurement cell
B.1 Silver chloride-specific electrode
B.2 Example of calibration curve for chloride ion-
     specific electrode

Specifies a method for the determination of the thermal stability at elevated temperature of compounds and products based on vinyl chloride homopolymers and copolymers which undergo dehydrochlorination. Coverage includes reagents, apparatus and precision. Also includes annexes and diagrams.

Committee
PRM/21
DevelopmentNote
Renumbered and superseded by BS EN ISO 182-4. (03/2002)
DocumentType
Standard
PublisherName
British Standards Institution
Status
Superseded
SupersededBy
Supersedes

Standards Relationship
ISO 182-4:1993 Identical

BS 7825-3.1:1997 Calibration of rubber and plastics test equipment. Calibration schedules Thermal properties

ISO 182-2:1990 Plastics Determination of the tendency of compounds and products based on vinyl chloride homopolymers and copolymers to evolve hydrogen chloride and any other acidic products at elevated temperatures Part 2: pH method
ISO 4793:1980 Laboratory sintered (fritted) filters — Porosity grading, classification and designation
ISO 182-3:1993 Plastics — Determination of the tendency of compounds and products based on vinyl chloride homopolymers and copolymers to evolve hydrogen chloride and any other acidic products at elevated temperatures — Part 3: Conductometric method
ISO 565:1990 Test sieves — Metal wire cloth, perforated metal plate and electroformed sheet — Nominal sizes of openings

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