BS 2782-1:Method 130A:1991
Current
The latest, up-to-date edition.
Methods of testing plastics. Thermal properties Determination of the thermal stability of polyvinyl chloride by the Congo red method
Hardcopy , PDF
English
30-04-1991
Important note : Users cannot be edited or removed once added to your Multi user PDF.
National foreword
Committees responsible
Method
1. Scope
2. Normative references
3. Principle
4. Reagents
5. Apparatus
6. Preparation of test portions
7. Number of tests
8. Temperatures for dehydrochlorination
9. Procedure
10. Expression of results
11. Precision
12. Test report
Figure
1. Arrangement of the test tube in the oil bath
A test piece is maintained at a constant temperature and the amount of acidic gas evolved is measured using indicator paper.
| Committee |
PRI/21
|
| DevelopmentNote |
Also numbered as ISO 182-1 Supersedes 89/41649 DC and BS 2782-1.130A(1976) (06/2005)
|
| DocumentType |
Standard
|
| Pages |
10
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
1.1 This part of ISO 182 specifies a method for the determination of the thermal stability at elevated temperature of compounds and products based on vinyl chloride homopolymers and copolymers (in the following text abbreviated to PVC) which undergo dehydrochlorination (the evolution of hydrogen chloride).
1.2 The method is intended primarily as a simple and rapid quality-control test during the manufacture and conversion of PVC compounds. It may be used also for the characterization of PVC compounds and products.
It is suitable for coloured compounds and products where a discolouration test under the action of heat may be unsatisfactory.
1.3 The method is recommended for compounded materials and products only. It is not recommended for compounds in the form of dry blends since such materials may not be sufficiently homogeneous.
PVC compounds and products may evolve decomposition products in addition to hydrogen chloride at elevated temperatures. A limited number of these decomposition products may affect the time to colour change of the indicator paper. It is not possible to compensate for this effect within the scope of this part of ISO 182, and therefore care is necessary in comparing results for dissimilar compounds and products.
| BS 7722:2002 | Surface covered PVC-U profiles for windows and doors. Specification |
| BS 7825-3.1:1997 | Calibration of rubber and plastics test equipment. Calibration schedules Thermal properties |
| BS 7413:1991 | Specification for white PVC-U extruded hollow profiles with heat welded corner joints for plastics windows: materials type A |
| BS 7413:2002 | Unplasticized polyvinyl chloride (PVC-U) profiles for windows and doors. Specification |
| BS 2782-0:1982 | Methods of testing plastics Introduction |
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.