This International Standard specifies a pyrolytic method for the determination of the carbon black content of vulcanizates of the following polymers :
Natural rubber
Synthetic polyisoprene
Polybutadiene
Styrene butadiene rubber
Butyl rubber
Acrylate rubber
Ethylene-propylene copolymer
Ethylene-propylene terpolymer
This method is not suitable for vulcanizates containing halogens or nitrogen in the polymer or for those containing certain compounding materials, such as lead salts or phenolic resins, which cause the formation of a carbona-ceous residue during pyrolysis.
The precision of the method may be affected if mineral fillers are present which dissociate at the pyrolysis temperature.