Abstract
Mixing of silica-silane rubber compound used for dispersion and the devolatilization of a silica compound in an internal mixer was experimentally and theoretically verified. The frequency of surface renewal and the surface-to-volume ratio of the compound as well as a low ethanol pressure in the void space of the mixer are identified as the main contributors. Ethanol is evaporated from the free surface in the mixing of silica compounds and is generated as a product from the silanization reaction. In an internal mixer, the flow induced mass transfer is caused by the rotor movement which results in a thin layer of materials on the mixer chamber wall. The result shows that devolatilization efficiency is strongly dependent on the free surface area of the compound in the mixer on simulation, as the efficiency of the silanization is strongly affected by ethanol transport across the interface between the rubber phase and the vapor phase in the mixer.
| Original language | English |
|---|---|
| Pages (from-to) | 614-618 |
| Number of pages | 4 |
| Journal | Kautschuk und Gummi, Kunststoffe |
| Volume | 60 |
| Issue number | 11 |
| Publication status | Published - Nov 2007 |
Keywords
- NLA