Norm

NEN-ISO 18852:2012 en

Rubbermengsels - Bepaling van het specifieke oppervlak met methoden met stikstofadsorptie

  • Deze norm is ingetrokken sinds 19-06-2015

52,53

Over deze norm

Status Ingetrokken
Aantal pagina's 11
Commissie Rubber
Gepubliceerd op 01-04-2012
Taal Engels
This International Standard specifies a method for the determination of the nitrogen surface area (NSA) of carbon blacks and other rubber compounding ingredients, like silicas and zinc oxides, based on the Brunauer, Emmett and Teller (BET) theory of gas adsorption using a multipoint determination. This test method specifies the sample preparation and treatment, instrument calibration, required accuracy and precision of the experimental data, and calculation of the surface area results from the data obtained. Also given is a procedure for calculating the statistical thickness surface area (STSA), otherwise known as the external surface area. The test method specified uses an automatic static-volume vacuum apparatus, the surface area being calculated using the BET theory based on monolayer measurements. The method can also be used for verifying “single-point” procedures described in ISO 4652-1 and other standards. The automatic instruments described in these standards perform all the necessary computations, including that of the surface area based on statistical thickness. However, the automatic point-setting procedures used are not applicable to the STSA method.

Details

ICS-code 83.040.20
Nederlandse titel Rubbermengsels - Bepaling van het specifieke oppervlak met methoden met stikstofadsorptie
Engelse titel Rubber compounding ingredients - Determination of multipoint nitrogen surface area (NSA) and statistical thickness surface area (STSA)
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