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Preparation and Rheological Characteristics of Solvent‐Cast Poly(ethylene oxide)/Montmorillonite Nanocomposites
Author(s) -
Choi Hyoung J.,
Kim Seong G.,
Hyun Yang H.,
Jhon Myung S.
Publication year - 2001
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/1521-3927(20010301)22:5<320::aid-marc320>3.0.co;2-3
Subject(s) - materials science , montmorillonite , nanocomposite , rheology , shear thinning , composite material , ethylene oxide , shear rate , rheometer , viscosity , casting , chemical engineering , polymer , copolymer , engineering
The organophilic montmorillonite clay and poly(ethylene oxide) (PEO) nanocomposites were intercalated by a solvent casting method using chloroform as the cosolvent. The prepared nanocomposites were characterized by an X‐ray diffraction method to examine their microstructure. Rheological properties of both the PEO/clay nanocomposites and the immiscible PEO/clay blends were investigated via a rotational rheometer in steady shear mode with a parallel plate geometry. The shear thinning viscosity data were fitted with the Carreau model, which showed that steady shear viscosity increases with increasing clay loading. The hysteresis phenomenon is observed to be enhanced with clay loading. PEO/clay nanocomposites exhibit higher zero‐shear‐rate viscosity and sharper shear thinning behaviors than immiscible PEO/clay blends.