NF ISO 247-1

NF ISO 247-1

September 2018
Standard Current

Rubber - Determination of ash - Part 1 : combustion method

This document specifies three methods for the determination of ash from raw rubbers, compounded rubbers and vulcanizates. The methods are applicable to raw, compounded or vulcanized rubbers of the M, N, O, R and U families described in ISO 1629, except that:— Method A is not used for the determination of ash from compounded or vulcanized rubbers containing chlorine, bromine or iodine;— Method B is used for compounded or vulcanized rubbers containing chlorine, bromine or iodine. It shall not be used for uncompounded rubbers;— Method C is intended to be used for the determination of ash from raw, compounded or vulcanized rubber not containing chlorine, bromine or iodine by wrapping the test portion in ashless filter paper;— Lithium and fluorine compounds might react with silica crucibles to form volatile compounds, giving low ash results. Platinum crucibles shall therefore be used for ashing fluorine-containing and lithium-polymerized rubbers.This document does not cover the interpretation of the ash results as to the inorganic chemical content of a compound or vulcanizate. This is the responsibility of the analyst, who has to be aware of the behaviour of rubber additives at elevated temperatures.

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Main informations

Collections

National standards and national normative documents

Publication date

September 2018

Number of pages

11 p.

Reference

NF ISO 247-1

ICS Codes

83.040.10   Latex and raw rubber
83.060   Rubber

Classification index

T43-105-1

Print number

1

International kinship

ISO 247-1:2018
Sumary
Rubber - Determination of ash - Part 1 : combustion method

This document specifies three methods for the determination of ash from raw rubbers, compounded rubbers and vulcanizates. The methods are applicable to raw, compounded or vulcanized rubbers of the M, N, O, R and U families described in ISO 1629, except that:

— Method A is not used for the determination of ash from compounded or vulcanized rubbers containing chlorine, bromine or iodine;

— Method B is used for compounded or vulcanized rubbers containing chlorine, bromine or iodine. It shall not be used for uncompounded rubbers;

— Method C is intended to be used for the determination of ash from raw, compounded or vulcanized rubber not containing chlorine, bromine or iodine by wrapping the test portion in ashless filter paper;

— Lithium and fluorine compounds might react with silica crucibles to form volatile compounds, giving low ash results. Platinum crucibles shall therefore be used for ashing fluorine-containing and lithium-polymerized rubbers.

This document does not cover the interpretation of the ash results as to the inorganic chemical content of a compound or vulcanizate. This is the responsibility of the analyst, who has to be aware of the behaviour of rubber additives at elevated temperatures.

Replaced standards (1)
NF ISO 247
April 2007
Standard Cancelled
Rubber - Determination of ash

ISO 247:2006 specifies two methods for the determination of ash from raw rubbers, compounded rubbers and vulcanizates. The methods are applicable to raw, compounded or vulcanized rubbers of the M, N, O, R and U families described in ISO 1629, except that: Method A is not intended to be used for the determination of ash from compounded or vulcanized rubbers containing chlorine, bromine or iodine.Method B is intended to be used for compounded or vulcanized rubbers containing chlorine, bromine or iodine. lt is not intended to be used for uncompounded rubbers.

Table of contents
  • Avant-propos
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Principe
  • 5 Réactif
  • 6 Appareillage
  • 7 Préparation de la prise d'essai
  • 8 Mode opératoire
  • 9 Expression des résultats
  • 10 Fidélité
  • 11 Rapport d'essai
  • Annexe A (informative) Fidélité
  • Bibliographie
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