20/30383761 DC - BS ISO 248-1. Rubber, raw. Determination of volatile-matter content. Part 1. Hot-mill method and oven method

20/30383761 DC

BS ISO 248-1. Rubber, raw. Determination of volatile-matter content. Part 1. Hot-mill method and oven method

Status : Current, Draft for public comment   Published : February 2020

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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.




Standard Number20/30383761 DC
TitleBS ISO 248-1. Rubber, raw. Determination of volatile-matter content. Part 1. Hot-mill method and oven method
StatusCurrent, Draft for public comment
Publication Date17 February 2020
Normative References(Required to achieve compliance to this standard)ISO 1795, ISO 2393
Informative References(Provided for Information)ISO/TR 9272, ISO 19983, ISO 1629
International RelationshipsISO/DIS 248-1
Draft Expiry Date06 April 2020
DescriptorsVulcanized rubber, Rubber, Volatile matter determination, Water content determination, Chemical analysis and testing, Reproducibility, Synthetic rubber, Gravimetric analysis, Natural rubber, Testing conditions
ICS83.040.10
Title in FrenchCaoutchouc brut — Détermination des matières volatiles — Partie 1: Méthode par mélangeage à chaud et méthode par étuvage Partie 1: Méthode par mélangeage à chaud et méthode par étuvage
CommitteePRI/50
PublisherBSI
FormatA4
DeliveryYes
Pages17
File Size304 KB
NotesWarning: this draft is not current beyond its expiry date for comments.
Price£20.00


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