GB/T 3780.24-2017Carbon black-Part 24: Determination of void volume (English PDF)

3.1 Compressed volume (carbon black)

A certain amount of carbon black in the cylinder body by exerting a predetermined pressure on the apparent pressure after the apparent volume.

3.2 Theoretical volume (carbon black)

Assuming that there is no void space in the carbon black, a certain amount of carbon black has the volume. Carbon black, as measured by a given mass and a specific test method, is true

Density ratio derived.

3.3 Void volume (carbon black)

Volume of all closed pores in the carbon black primary structure. By carbon black aggregate particles of irregular and non-spherical characterization, expressed as one

The difference (compression volume - theoretical volume), as a function of bearing pressure, is normalized to 100 g mass.

Note Carbon black is subject to packaging, compression and breakage due to irregularities and entanglements of its aggregates, particle size distribution and aggregate strength or interparticle interconnections within the aggregate branches broken. The void volume of carbon black compression is also affected by the reaction forces of the cylinder wall and the piston head, which forces in turn depend on the morphology of the sample

Height to cylinder diameter) or interfacial area, which will affect the uniformity of compaction density. Due to the compressed void volume depends on the cylinder geometry

Inch and may depend on the area of the cylinder wall (ie, the effect of friction), the measured compression volume may not be the true compression volume unless these factors are obtained

Correction or may not count.