Precipitated silicas
摘要:
Rubber compositions comprising a precipitated silica with the following physico-chemical properties: BET surface area  35 to 350 m2/g BET/CTAB surface area ratio 0.8 to 1.1 Pore volume, PV 1.6 to 3.4 ml/g Silanol group density  6 to 20 ml/(5 g) Average aggregate size 250 to 1500 nm CTAB surface area  30 to 350 m2/g DBP value 150 to 300 ml/100 g V2/V1 by Hg porosimetry0.19 to 0.46 DBP/CTAB 1.2 to 3.5.
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