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ISO 305:2019

Plastics — Determination of thermal stability of poly(vinyl chloride), related chlorine-containing homopolymers and copolymers and their compounds — Discoloration method

May 15, 2019

General information

90.93     Oct 7, 2024

ISO

ISO/TC 61/SC 9

International Standard

83.080.20  

English   French  

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Published

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Scope

This document specifies two methods for the determination of the thermal stability of products and compounds based on vinyl chloride homopolymers and copolymers (referred to simply as PVC in the following text) by the extent of the discoloration that occurs when they are exposed, in the form of sheet, to elevated temperatures. The two methods are:
— Method A: Oil-bath method;
— Method B: Oven method.
These methods are particularly applicable to the determination of the resistance of PVC to degradation by heat, as assessed by the change in colour after different times of heating under standardized conditions. The results are comparative only, and can be unsatisfactory when coloured PVC materials are tested.
The stability times given by the two methods might not be similar and cannot be used for direct-comparison purposes.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 305:1990

NOW

PUBLISHED
ISO 305:2019
90.93 Standard confirmed
Oct 7, 2024

National adoptions

SRPS EN ISO 305:2019  
ISS

Plastics - Determination of thermal stability of poly(vinyl chloride), related chlorine-containing homopolymers and copolymers and their compounds - Discoloration method (ISO 305:2019)

60.60   Standard published

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