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EVS-EN ISO 305:2019

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

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Kehtiv alates 02.07.2019
Alusdokumendid
ISO 305:2019; EN ISO 305:2019
Tegevusala (ICS grupid)
83.080.20 Termoplastid
Direktiivid või määrused
puuduvad
Standardi ajalugu
Staatus
Kuupäev
Tüüp
Nimetus
02.07.2019
Põhitekst
01.09.2003
Põhitekst
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.
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