Vergleichende Untersuchungen zur Bestimmung der sauren Oberflächenoxide von Gasrußen

An attempt is made to quantitatively determine acidic surface oxides on some carbon blacks. The applicability of some analytical methods is discussed. The results of neutralisation reactions suggest that four different surface groups exist. It is taken as reference method. Because of this very slow method it is discussed whether there exist some faster and comparable methods. A comparison is done to investigate changes in surface groups of a special chemically treated, bleached carbon black. To impart jetness to paint films carbon blacks are widely used. To treat carbon blacks with a special chemical process may influence the stability of black paint systems. The surface groups of carbon blacks vary in their acidity. Neutralisation reactions with bases of different strength, an indirect titration, are compared with direct titration in a non aqueous solution and with silylation reactions.