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

Superseded

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

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Superseded date: 25-02-2002

Language(s):

Published date: 23-11-2012

Publisher: British Standards Institution

Table of Contents - (Show below) - (Hide below)

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

Abstract - (Show below) - (Hide below)

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.

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Committee	PRM/21
Development Note	Renumbered and superseded by BS EN ISO 182-4. (03/2002)
Document Type	Standard
ISBN
Pages
Published
Publisher	British Standards Institution
Status	Superseded
Superseded By	BS EN ISO 182-4:2001
Supersedes	91/45825 DC : OCT 91

International Equivalents – Equivalent Standard(s) & Relationship - (Show below) - (Hide below)

Equivalent Standard(s)	Relationship
ISO 182-4:1993	Identical

Standards Referenced By This Book - (Show below) - (Hide below)

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

Standards Referencing This Book - (Show below) - (Hide below)

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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