ISO 5478:1990
Rubber; determination of styrene content; nitration method
- Standard No.
- ISO 5478:1990
- Release Date
- 1990
- Published By
- International Organization for Standardization (ISO)
- Status
- Replace By
- ISO 5478:2006
- Latest
- ISO 5478:2006
- Scope
- Applicable to all types of styrene-butadiene rubber (SBR) including oil-extended types and also for block copolymers containing up to 50 % (m/m) of styrene. The procedure may give low results when the content of mineral fillers insoluble in nitric acid exceeds 5 % (m/m). The principle is based on the extraction of a test portion with acetone and digestion with nitric acid to oxidize the styrene to p-nitrobenzoic acid. Extraction of the p-nitrobenzoic acid with diethyl ether. Extraction of the p-nitrobenzoic acid from the ether with sodium hydroxide solution and spectrometrical measurement in the ultraviolet spectral region. Cancels and replaces ISO 5478:1980, of which it constitutes a technical revision.
ISO 5478:1990 history
- 2006 ISO 5478:2006 Rubber - Determination of styrene content - Nitration method
- 1990 ISO 5478:1990 Rubber; determination of styrene content; nitration method
- 1980 ISO 5478:1980 Rubber — Determination of styrene content — Nitration method
