Résumé
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.
Informations générales
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État actuel: AnnuléeDate de publication: 1990-11Stade: Annulation de la Norme internationale [95.99]
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Edition: 2Nombre de pages: 4
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Comité technique :ISO/TC 45/SC 2ICS :83.060
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Cycle de vie
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Précédemment
AnnuléeISO 5478:1980
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Actuellement
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Révisée par
AnnuléeISO 5478:2006