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  • BSI
    BS 2782-1:Method 130A:1991, ISO 182-1:1990 Methods of testing plastics. Thermal properties - Determination of the thermal stability of polyvinyl chloride by the Congo red method
    Edition: 1991
    $266.02
    / user per year

Description of BS 2782-1:Method 130A:1991 1991

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.



A test piece is maintained at a constant temperature and the amount of acidic gas evolved is measured using indicator paper.

Standard NumberBS 2782-1:Method 130A:1991, ISO 182-1:1990
TitleMethods of testing plastics. Thermal properties - Determination of the thermal stability of polyvinyl chloride by the Congo red method
StatusUnder Review
Publication Date1991-04-30
ReplacesBS 2782-1 Method 130A:1976
Identical National Standard OfISO 182-1:1990
DescriptorsPlastics and rubber technology, Testing conditions, Test equipment, Thermal testing, Chemical analysis and testing, Congo red, Homopolymers, Polymers, Plastics, Copolymers, Thermal stability, Polyvinyl chloride, Specimen preparation, Degradation, Decomposition reactions, High-temperature testing
ICS83.080.20 Thermoplastic materials
CommitteePRI/21
ISBN0 580 19593 7
PublisherBSI
Pages10

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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