International Standard
ISO 305:2019
Plastics — Determination of thermal stability of poly(vinyl chloride), related chlorine-containing homopolymers and copolymers and their compounds — Discoloration method
Reference number
ISO 305:2019
Edition 3
2019-05
© ISO 2024
International Standard
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Published (Edition 3, 2019)

ISO 305:2019

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Language
CHF 42
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Abstract

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.

General information

  • Status
     : Published
    Publication date
     : 2019-05
    Stage
    : International Standard under systematic review [90.20]
  • Edition
     : 3
    Number of pages
     : 6
  • Technical Committee :
    ISO/TC 61/SC 9
    ICS :
    83.080.20 
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Life cycle

Sustainable Development Goals

This standard contributes to the following Sustainable Development Goal

9
Industry, Innovation and Infrastructure

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