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ILNAS-EN ISO 305:2019
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06/2019
Plastics - Determination of thermal stability of poly(vinyl chloride), related chlorine-containing homopolymers and copolymers and their compounds - Discoloration method (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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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.
Status
| Standard - Active |
Origin
| Technical Committee : |
| CEN/TC 249 : Plastics |
Implementation
| start of the vote on the project | 07/02/2019 | date of ratification (dor) | 26/05/2019 | |||
| end of the vote on the project | 25/04/2019 | date of anouncement (doa) | 30/09/2019 | |||
| start of the vote on the final project | 08/04/2020 | date of publication (dop) | 31/12/2019 | |||
| end of the vote on the final project | 03/06/2020 | date of withdrawal (dow) | 31/12/2019 |
|
Publication Official Journal
of the Grand-Duchy of Luxembourg |
17/07/2019 |
| Reference | Mémorial A N° 508 |
Relations
| Relations to older standards |
| ILNAS-EN ISO 305:1999 |
| Relations to international standards |
| ISO 305:2019 |
| ISO 305 |
International Classification for Standards (ICS codes) :
| 83.080.20 : Thermoplastic materials |
