NF ISO 9924-3, T46-047 (04/2024)

This document specifies a thermogravimetric method for determining the main constituents of rubber mixtures such as elastomer(s), carbon black and mineral fillers. It makes it possible to establish the “identity sheet” of the material tested. However, the result obtained does not always correspond exactly to the theoretical rubber formula. This method is applicable to rubbers in the raw state or in the form of vulcanized and unvulcanized mixtures, with or without extraction. This method applies to hydrocarbon chain rubbers (NR, BR, SBR, IIR, EPDM, ACM, AEM, etc.) used alone or in combination in formulations. In the latter case, the polymer content corresponds to the total rubber and, most of the time, it is not possible to determine said polymers individually. This method applies to rubbers with a halogenated hydrocarbon chain (CR, CSM, FKM, CM, CO, ECO, etc.) or nitrogenous (NBR, HNBR, NBR/PVC, etc.), as well as their combinations. However, these rubbers frequently form carbonaceous residues which interfere with the analysis. Using an appropriate operating procedure helps minimize this interference. This method also applies to polysiloxane chain rubbers (VMQ, etc.) and rubbers not mentioned above.
(Automatic translation from French)