512 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS 90 80 70 60 SILICA % WET CAKE MOISTURE (WCM) VERSUS AVERAGE PARTICLE SIZE 3 4 5 6 7 8 9 10 AVERAGE PARTICLE SIZE {/•m) Figure 13. Plot of silica structure versus average particle size 1,000 90( 801 70( 6O( 500 400 300 lO( sILICA STRUCTURE INDEX VERSUS MERCURY INTRUSION POROSITY LOG Sl = 0.34 (HGI POROSITY) +4.33 Jl I I I I 1 2 3 4 5 6 MERCURY INTRUSION POROSITY Figure 14. Plot of silica structure versus mercury intrusion porosity
PROPERTIES AND STRUCTURE OF SILICAS 513 300 250 . 200 ,, 150 Z cl IO0 MINERAL OIL DRYING-UP CAPACITY OF PRECIPITATED SILICAS 50 3øø F 250 A B C D E F SILICA Figure 15. Mineral oil drying-up capacity of precipitated silicas SORBITOL DRYING-UP CAPACITY OF PRECIPITATED SILICAS ' 200 D 150 z lOO 5o A B C D E F SILICA Figure 16. Sorbitol drying-up capacity of precipitated silicas
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