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Fumed silica – rheological additive for adhesives, resins, and paints
Author(s) -
Barthel Herbert,
Dreyer Michael,
GottschalkGaudig Torsten,
Litvinov Victor,
Nikitina Ekaterina
Publication year - 2002
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/1521-3900(200209)187:1<573::aid-masy573>3.0.co;2-1
Subject(s) - fumed silica , thixotropy , rheology , materials science , silicon dioxide , chemical engineering , composite material , engineering
Fumed silica, a synthetic silicon dioxide, is a powerful rheological additive for resins and paints to introduce thixotropy or even a yield point. The rheological effectiveness of fumed silica is based on its ability to form percolating networks which immobilize large volumes of liquid. By a combination of advanced rheological experiments, spectroscopical investigations, and quantum chemical calculations it could be demonstrated that the formation and stability of the silica network is strongly influenced by particle‐resin interactions. The results can be used to develop comprehensive models, which explain the rheological performance of different grades of fumed silica in different resins.