Reference number
ISO 305:2019
© ISO 2025
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
Edition 3
2019-05
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Published (Edition 3, 2019)
This publication was last reviewed and confirmed in 2024. Therefore this version remains current.

ISO 305:2019

Language
Format
CHF 43
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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 confirmed [90.93]
  • Edition
     : 3
    Number of pages
     : 6
  • Technical Committee :
    ISO/TC 61/SC 9
    ICS :
    83.080.20 
  • RSS updates

Life cycle

Sustainable Development Goals

This standard contributes to the following Sustainable Development Goal

9
Industry, Innovation and Infrastructure

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