ISO 9924-2:2016 Rubber and rubber products - Determination of the composition of vulcanizates and uncured compounds by thermogravimetry - Part 2: Acrylonitrile-butadiene and halobutyl rubbers
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ISO 9924-2:2016 specifies a thermogravimetric method for the determination of the total organic content, carbon black content, carbonaceous residue and ash in vulcanizates and uncured compounds containing polymers which form a carbonaceous residue on pyrolysis (see 1.2). The loss in mass at around 300 Â°C is an approximate guide to the volatile-matter content of the compound. The method is suitable for the analysis of rubber compounds and vulcanizates containing the hydrocarbon polymers covered by ISO 9924-1 plus the following copolymers with polar groups which form a carbonaceous residue on pyrolysis: a) acrylonitrile-butadiene copolymers (NBRs); b) carboxylated acrylonitrile-butadiene copolymers (XNBRs); c) hydrogenated acrylonitrile-butadiene copolymers (HNBRs); d) chlorinated isobutylene-isoprene copolymers (CIIRs); e) brominated isobutylene-isoprene copolymers (BIIRs).