ISO 9924-2:2016 PDF
Rubber and rubber products — Determination of the composition of vulcanizates and uncured compounds by thermogravimetry — Part 2: Acrylonitrile-butadiene and halobutyl rubbers
Rubber and rubber products — Determination of the composition of vulcanizates and uncured compounds by thermogravimetry — Part 2: Acrylonitrile-butadiene and halobutyl rubbers
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 10
- Дата публикации:
- 18 июля 2016 г.
- Издание:
- ISO IS 9924 edition 2 version 1
- ICS:
- 83.060
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 °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).
Abstract
Overview
ISO 9924-2:2016 specifies a thermogravimetric method to determine the composition of vulcanizates and uncured rubber compounds based on mass loss on heating. It covers acrylonitrile-butadiene (NBR) and related polar copolymers plus halobutyl rubbers (CIIR, BIIR) that form a carbonaceous residue on pyrolysis. Key outputs are total organic content, carbon black content, carbonaceous residue, ash, and an approximate guide to volatile matter (loss near 300 °C).
Key topics and technical requirements
- Principle: A weighed sample is heated in an inert nitrogen stream (40 → 600 °C) to pyrolyse organics; after cooling to 400 °C the atmosphere is switched to air/oxygen and heated to 800 °C to oxidize carbonaceous residue and carbon black. Residue at 800 °C = ash.
- Instrumentation:
- Thermogravimetric analyser with temperature programmer and switching gas supply.
- Thermobalance capable of 0.1 mg resolution.
- Dry nitrogen (
Технические детали
- Технический комитет
- ISO/TC 45/SC 2 - Testing and analysis
- SKU
- ISO 9924-2:2016
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