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

Publication date: 13 dhj 1990

General information

Current stage: 90.20 Effective date: 15 pri 2025

Originator: ISO

Owner: ISO/TC 61/SC 9

Type: International Standard

ICS: 83.080.20

Gjuha: frëngjisht anglisht

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Statusi: Publikuar

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Scope

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.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO/R 182:1970

NOW

PUBLISHED
ISO 182-2:1990
90.20 Standard under periodical review
15 pri 2025

REVISED BY

ABANDON
ISO/DIS 182-2

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