Abstract
The aim of the present investigation was to find a correlation between one single analytical parameter of precipitated silica and its in-rubber dispersibility. Therefore, 25 different types of silica with a variety of analytical parameters and dosage forms were investigated by means of standard analytical methods (CTAB, BET, DOA, pH and moisture content) as well as t*wo new methods, the sedimentation test and the in-situ cluster fragmentation. Moreover, all types of silica *were mixed inside a typical Green Tire formulation filled with 80 phr of silica. The macro-dispersion quality was evaluated by means of two dispersion measurement systems, the Topography where the surface roughness of a rubber sample is scanned mechanically by a probe and the Dispertester where the sample is investigated by an optical light microscope. No significant linear correlation between the standard analytical parameter and the macro-dispersion quality could be found whereas the sedimentation method and in-situ cluster fragmentation provides promising approaches. However, it was not possible to directly predict the in-rubber dispersibility of silica by means of one single analytical parameter with a very high correlation coefficient. Finally, different aspects which limit the general approach were discussed. Taking all these facts into account it becomes obvious that a linear correlation of one single analytical parameter with the dispersion quality cannot be found.
Original language | English |
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Pages (from-to) | 25-34 |
Number of pages | 10 |
Journal | KGK Kautschuk Gummi Kunststoffe |
Volume | 72 |
Issue number | 5 |
Publication status | Published - 1 Jan 2019 |