Title: Effect of Thermally Reduced Graphene Sheets on the Phase Behavior, Morphology, and Electrical Conductivity in Poly[(alpha-methyl styrene)-co-(acrylonitrile)/poly(methyl-methacrylate) Blends
Authors: Vleminckx, Giovanni
Bose, Suryasarathi
Leys, Jan
Vermant, Jan
W├╝bbenhorst, Michael
Abdala, Ahmed A
Macosko, Chris
Moldenaers, Paula # ×
Issue Date: Aug-2011
Publisher: American Chemical Society
Series Title: ACS Applied Materials and Interfaces vol:3 issue:8 pages:3172-3180
Abstract: The effects of thermally reduced graphene sheets (TRG) on the phase separation in poly[(alpha-methyl styrene)-co-(acrylonitrile)]/poly(methyl-methacrylate) blends were monitored using melt rheology, conductivity spectroscopy, and electron microscopic techniques. The TRG were incorporated in the single-phase material by solution mixing. The composite samples were then allowed to phase separate in situ. The thermodynamics of phase separation have been investigated by monitoring the evolution of the storage modulus (G') as a function of temperature as the system passes through the binodal and the spinodal lines of the phase diagram. The phase separation kinetics were probed by monitoring the evolution of G' as a function of time at a quench depth well in the spinodal region. It was observed that TRG significantly influenced the phase separation temperature, the shape of the phase diagram and the rate of phase separation. The state of dispersion of TRG in the blends was assessed using electron microscopy and conductivity spectroscopy measurements. Interestingly, the composite samples (monophasic) were virtually insulators at room temperature, whereas highly conducting materials were obtained as a result of phase separation in the biphasic materials.
ISSN: 1944-8244
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Soft Matter and Biophysics
Soft Matter, Rheology and Technology Section
× corresponding author
# (joint) last author

Files in This Item:
File Description Status SizeFormat
Vleminckx-am200669w.pdffull text Published 2596KbAdobe PDFView/Open Request a copy

These files are only available to some KU Leuven Association staff members


All items in Lirias are protected by copyright, with all rights reserved.

© Web of science