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Rheological behavior of hydrophilic silica dispersion in polyethylene glycol
Author(s) -
Park JongHwan,
Kim Hogyum,
Han DongHee,
Lim JeongCheol,
Oh DaeHee,
Min KyungEun
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.23774
Subject(s) - fumed silica , rheology , polyethylene glycol , materials science , dispersion (optics) , chemical engineering , peg ratio , hydrophobic silica , silica gel , shear stress , polymer chemistry , composite material , finance , physics , optics , engineering , economics
The rheological properties of hydrophilic fumed silica dispersed in polyethylene glycol (PEG) were investigated. The dispersion was prepared by dispersing the fumed silica in PEG with various concentrations. The reversible sol–gel transition was observed over 5 wt % of silica concentration as a function of temperature. The gelation temperature was found to depend on the applied shear stress and silica concentration, and the high shear stress was found to lead to the decrease of sol–gel transition temperature of the dispersion with the same silica concentration. As the silica concentration increases, the sol–gel transition shifts to the lower temperature. © 2006 Wiley Periodicals, Inc. J Apple Polly Sci 103: 2481–2486, 2007