Plastics. Determination of thermal stability of poly(vinyl chloride), related chlorine-containing homopolymers and copolymers and their compounds. Discoloration method
83.080.20 - Thermoplastic materials
EN ISO 305
Reemplaza a: BS EN ISO 305:1999
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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