BS 2782-1.130D(1993) : 1993 AMD 13567
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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 - THERMAL PROPERTIES - DETERMINATION OF THE THERMAL STABILITY OF POLYVINYL CHLORIDE BY THE POTENTIOMETRIC METHOD
25-02-2002
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Renumbered and superseded by BS EN ISO 182-4.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Superseded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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