Reference number
ISO 182-2:1990
ISO 182-2:1990
© ISO 2024
International Standard
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
Edition 1
1990-12
1990-12
ISO 182-2:1990
4025
Published
(Edition 1, 1990)
This publication was last reviewed and confirmed in 2020.
Therefore this version remains current.
Abstract
May be used as a quality-control test during manufacture and conversion of PVC compounds and for coloured compounds. Is not recommended for compounds in the form of dry blends. Defines the stability time. The principle consists in exposing a sample of the material at an agreed temperature in a gas stream, followed by absorption of the hydrogen chloride evolved in a 0.1 mol/l solution of sodium chloride. The amount of hydrogen chloride evolved is measured by recording the change in pH of the sodium chloride solution. Figures show the general arrangement of apparatus and details of the dehydrochlorination cell. Together with three other parts of ISO 182, cancels and replaces ISO Recommendation R 182:1970.
General information
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Status: PublishedPublication date: 1990-12Stage: International Standard confirmed [90.93]
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Edition: 1Number of pages: 11
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Technical Committee :ISO/TC 61/SC 9ICS :83.080.20
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Life cycle
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Previously
WithdrawnISO/R 182:1970
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Now