Gummi - Bestämning av halten extraherbara ämnen (ISO 1407:2009, IDT)
Prenumerera på standarder med tjänst SIS Abonnemang. Genom att prenumerera får du effektiv åtkomst till gällande standarder och säkerställer att ditt företag alltid har tillgång till senaste utgåvan.
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This International Standard specifies three methods for the quantitative determination of the material extractable from raw rubbers, both natural and synthetic, and their unvulcanized and vulcanized compounds. - method A measures the mass of the solvent extract, after evaporation of the solvent, relative to the mass of the original test portion; - method B measures the difference in the mass of the test portion before and after extraction; - method C, which is for raw rubber only, measures the difference in the mass of the test portion before and after extraction using boiling solvent. NOTE 1 Depending on the test method used, the conditioning of the test portion and the solvent used, the test result will not necessarily be the same. NOTE 2 Method C generally gives results which are lower than those obtained with methods A and B due to the fact that an equilibrium is set up, particularly if large test portions are used, depending on the content and the nature of the extractable matter. Method C is, however, a quicker method than method A or method B. NOTE 3 Method C is not suitable if the test portion disintegrates during the extraction. Recommendations as to the solvent most appropriate to each type of rubber are given in Annex A.
Gummi - Bestämning av halten extraherbara ämnen (ISO 1407:2009, IDT)
Prenumerera på standarder med tjänst SIS Abonnemang. Genom att prenumerera får du effektiv åtkomst till gällande standarder och säkerställer att ditt företag alltid har tillgång till senaste utgåvan.
Läs mer om SIS Abonnemang