Influence of Carbon Black Structure and Specific Surface Area on the Mechanical and Dielectric Properties of Filled Rubber Composites

Table 1

Typical properties of the carbon black used.

Carbon black	Iodine adsorption* mg/g	CTAB-surface area** m^2/g	BET surface area*** m^2/g	DBP-absorption mL/100g	CDBP absorption mL/100g
Corax N 220	121	96	105	98	70
Printex XE-2B	1091	600	1000	403	370

*The iodine number (iodine adsorption) reflects a “not true” surface area, because it is affected by porosity, surface impurities, and surface oxidation. **The cetyltrimethyl ammonium bromide (CTAB) surface area analyzes the so-called external surface area which corresponds to the accessible surface area for an elastomer. ***BET (Brunauer, Emmett, and Teller) nitrogen adsorption surface area provides the “total” surface area including porosity.