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BS ISO 248-1:2021 – TC

BS ISO 248-1:2021 – TC

$134.27

Tracked Changes. Rubber, raw. Determination of volatile-matter content – Hot-mill method and oven method

Published By Publication Date Number of Pages
BSI 2021 46
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This document specifies two methods for the determination of volatile-matter content in raw rubbers by using a hot mill or an oven.

These 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 di-olefins. These 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 two methods do not necessarily give identical results. Therefore, in the case 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.

PDF Catalog

PDF Pages PDF Title
28 National foreword
32 Foreword
33 1 Scope
2 Normative references
3 Terms and definitions
34 4 Principle
4.1 Hot-mill method
4.2 Oven method
5 Hot-mill method
5.1 General
5.2 Apparatus
5.3 Procedure
5.3.1 Hot-mill method, procedure A
35 5.3.2 Hot-mill method, procedure B
5.4 Expression of results
5.4.1 Hot-mill method, procedure A
5.4.2 Hot-mill method, procedure B
36 6 Oven method
6.1 General
6.2 Apparatus
6.3 Procedure
6.3.1 Oven method, procedure A
37 6.3.2 Oven method, procedure B
38 6.4 Expression of results
6.4.1 Oven method, procedure A
6.4.2 Oven method, procedure B
39 7 Precision
8 Test report
40 Annex A (informative) Selection of appropriate test method
41 Annex B (normative) Homogenization
42 Annex C (informative) Precision
44 Bibliography

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BS ISO 248-1:2021 - TC
$134.27