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ISO 248-1 1st Edition, October 15, 2011 Rubber, raw — Determination of volatile-matter content — Part 1: Hot-mill method and oven method
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Availability date: 07/13/2021
Description / Abstract:
This part of ISO 248 specifies two methods for the determination
of volatile-matter content in raw rubbers by using a hot mill or an
oven.
The methods are applicable to the determination of the
volatile-matter content in the "R" group of rubbers listed in ISO
1629. These are rubbers having an unsaturated carbon chain, for
example natural rubber and synthetic rubbers derived at least
partly from diolefins. The methods can also be applicable to other
raw rubbers, but in these cases it is necessary to demonstrate that
the change in mass is due solely to loss of actual volatile matter
and not to rubber degradation.
The hot-mill method is not applicable to natural rubber, to
synthetic rubbers which are too difficult to handle on a hot mill
or to synthetic rubbers in powder or chip form.
The test methods do not necessarily give identical results.
Therefore, in cases of dispute, the oven method, procedure A, is
the reference method.
NOTE The applicability of each test method to various types of
rubber is summarized in Annex A.