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Norm
ÖNORM EN ISO 305
Issue date: 1999 08 01
Plastics - Determination of thermal stability of poly(vinyl chloride), related chlorine-containing homopolymers and copolymers and their compounds - Discoloration method (ISO 305:1990)
1.1 This International Standard specifies two
methods for the determination of the thermal stability
of products and compounds based on Vinyl
chloride homopolymers and...
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Withdrawn
: 2019 08 15
Publisher:
Austrian Standards International
Format:
Digital | 6 Pages
Language:
German
| English
| Download GER/ENG
Currently valid:
Optionally co-design standards:
ICS
1.1 This International Standard 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.
- Method A: Oil-bath method
- Method B: Oven method
1.2 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 may be unsatisfactory when coloured PVC
materials are tested.
1.3 Method A is a simple method, which requires
little expenditure on apparatus and permits materials
to be tested almost in the absence of air.
Method B requires a forced-air oven, in which the
air flow is adjusted to provide a sufficiently uniform
temperature throughout the entire test area. This
method is not applicable to materials that will
Cross-contaminate during oven exposure.
The stability times given by the two methods may
not be similar and cannot be used for directcomparison
purposes.
ÖNORM EN ISO 305
2019 08 15
Plastics - Determination of thermal stability of poly(vinyl chloride), related chlorine-containing h...
Norm
ÖNORM EN ISO 305
1999 08 01
Plastics - Determination of thermal stability of poly(vinyl chloride), related chlorine-containing h...
Norm
↖
Norm
ÖNORM EN ISO 305
Issue date :
2019 08 15
Plastics - Determination of thermal stability of poly(vinyl chloride), related chlorine-containing homopolymers and copolymers and their compounds - Discoloration method (ISO 305:2019)
Norm
ISO 305:1990
Issue date :
1990 04 12
Plastics — Determination of thermal stability of poly(vinyl chloride), related chlorine-containing homopolymers and copolymers and their compounds — Discoloration method