Reference number
ISO 305:2019
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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ISO 305:2019
70415
Published (Edition 3, 2019)

ISO 305:2019

ISO 305:2019
70415
Language
Format
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

  •  : Published
     : 2019-05
    : Close of review [90.60]
  •  : 3
     : 6
  • ISO/TC 61/SC 9
    83.080.20 
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