Quantitative Determination of Natural Rubber Hydrocarbon by Refractive Index Measurements
| Autor: | Rachel J. Fanning, Norman Bekkedahl |
|---|---|
| Rok vydání: | 1952 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics technology industry and agriculture Analytical chemistry complex mixtures Quantitative determination Analytical Chemistry body regions Hydrocarbon chemistry Natural rubber visual_art Materials Chemistry visual_art.visual_art_medium Organic chemistry Refractive index psychological phenomena and processes |
| Zdroj: | Rubber Chemistry and Technology. 25:680-688 |
| ISSN: | 1943-4804 0035-9475 |
| DOI: | 10.5254/1.3543430 |
| Popis: | Rubbers from different sources vary considerably in rubber hydrocarbon content, from 70 per cent or less for some of the wild varieties to about 95 per cent for a good grade of plantation rubber. The quality of a rubber is measured to a great extent by the percentage of rubber hydrocarbon. A new procedure for the quantitative determination of this hydrocarbon has been developed, which involves the measurement of refractive index of a solution of a known weight of acetone-extracted rubber in a known weight of 1-bromonaphthalene. From the observed data and from other previously determined or known physical constants, such as the densities and refractive indexes of the rubber hydrocarbon and the solvent, the percentage of hydrocarbon in the original sample can be calculated. This new method gives results as good as, or better than, other existing methods, and is simpler and less time-consuming to perform. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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