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Standard Test Method for Carbon Black—Total and External Surface Area by Nitrogen Adsorption
NORMA vydaná dňa 1.5.2021
Označenie normy: ASTM D6556-21
Dátum vydania normy: 1.5.2021
Kód tovaru: NS-1029328
Počet strán: 6
Približná hmotnosť: 18 g (0.04 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
Brunauer/Emmett/Teller, carbon black, B.E.T., nitrogen adsorption, nitrogen surface area, statistical thickness surface area, surface area by multipoint B.E.T. method, external surface area,, ICS Number Code 71.060.10 (Chemical elements)
Significance and Use | ||||||||
4.1?This test method is used to measure the total and external surface area of carbon blacks based on multipoint nitrogen adsorption. The NSA measurement is based on the B.E.T. theory and it includes the total surface area, inclusive of micropores, pore diameters less than 2 nm (20 ?). The external surface area, based on the statistical thickness method (STSA), is defined as the specific surface area that is accessible to rubber. 4.2?CTAB Surface Area (formerly Test Method D3765) has been withdrawn. The CTAB value may be estimated from the STSA value using Eq 1. The equation is based on a linear regression of the STSA and CTAB measured values of the SRB 5 standards. |
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1. Scope | ||||||||
1.1?This test method covers the determination of the total surface area by the Brunauer, Emmett, and Teller (B.E.T. NSA) theory of multilayer gas adsorption behavior using multipoint determinations and the external surface area based on the statistical thickness surface area method. 1.2?The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.3?This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4?This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. |
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2. Referenced Documents | ||||||||
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