NF ISO 248-1

NF ISO 248-1

September 2021
Standard Current

Rubber, raw - Determination of volatile-matter content - Part 1 : hot-mill method and oven method

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.

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Main informations

Collections

National standards and national normative documents

Publication date

September 2021

Number of pages

19 p.

Reference

NF ISO 248-1

ICS Codes

83.040.10   Latex and raw rubber

Classification index

T43-104-1

Print number

1

International kinship

ISO 248-1:2021
Sumary
Rubber, raw - Determination of volatile-matter content - Part 1 : hot-mill method and oven method

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.

Replaced standards (1)
NF ISO 248-1
December 2011
Standard Cancelled
Rubber, raw - Determination of volatile-matter content - Part 1 : hot-mill method and oven method

Le présent document spécifie quatre méthodes pour la détermination de la teneur en eau et de la teneur en autres matières volatiles des caoutchoucs bruts : deux méthodes sont basées sur le mélangeage à chaud et deux méthodes sur l'étuvage. La partie 2, spécifiant une méthode thermogravimétrique avec analyseur automatique et séchage infrarouge, n'est pas reprise dans la collection nationale.

Table of contents
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  • Avant-propos
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Principe
  • 5 Méthode par mélangeage à chaud
  • 6 Méthode par étuvage
  • 7 Fidélité
  • 8 Rapport d'essai
  • Annexe B (normative) Homogénéisation
  • Annexe A (informative) Choix de la méthode d'essai appropriée
  • Annexe C (informative) Fidélité
  • Bibliographie
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