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| Название (рус.): | Каучук. Определение содержания стирола. Метод нитрования |
| Название (англ.): | Rubber; determination of styrene content; nitration method |
| Описание (англ.): | 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. |
| Заменяет стандарты: | ISO 5478(1980.12) |
| Дата регистрации: | 01.12.90 |
| Дата введения: | 15.11.90 |
| Код КГС: | Л69 |
| Код ОКСТУ: | 2294 |
| Код ОКС(МКС): | 83.060 |
| Код ОКП: | 2294 |
| Нормативные ссылки: | DIN 53621-7-1977, NEQ*DIN ISO 5478-1998, EQV ISO 383-1976*ISO 1407-1976*ISO 1795-1974*ISO 1796-1982*ISO 4655-1985*ISO 4661-2-1987 |
| Ключевые слова: | CHEMICAL ANALYSIS AND TESTING DETERMINATION OF CONTENT ELASTOMERS MATERIALS TESTING METHODS RUBBER RUBBER TECHNOLOGY STYRENE STYRENE-BUTADIENE RUBBER TESTING CHEMICAL ANALYSIS AND TESTIN |
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