NBN ISO 7270-1:2021

This document specifies a method for the identification of polymers, or blends of polymers, in raw
rubbers and in vulcanized or unvulcanized compounds from pyrograms (pyrolysis-gas chromatographic
patterns) obtained under the same conditions. This allows qualitative identification of single rubbers
or blends, with exceptions discussed below. This document is not intended for quantitative analysis.
The method applies first and foremost to single polymers. When the pyrogram indicates a characteristic
hydrocarbon, the method is also applicable to blends. For details, see Clause 5. The method can be also
applicable to other types of polymer when verified by the analyst in each particular case.
NOTE The use of this document pre-supposes sufficient working knowledge of the principles and techniques
of gas chromatography to enable the analyst to carry out the operations described and to interpret the results
correctly.