Structure and Properties of Epoxy/Fly Ash System: Influence of Filler Content and Surface Modification

Journal Article · Thu Aug 15 04:00:00 EDT 2019 · Journal of Materials Engineering and Performance

DOI:https://doi.org/10.1007/S11665-019-04215-8· OSTI ID:22970571

Skoura, E.; Gournis, D.; Karakassides, M. A. ^[1]; Delides, C. ^[2]

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1. University of Ioannina, Department of Materials Science and Engineering (Greece)
2. University of Western Macedonia, Department of Chemical Engineering (Greece)

Epoxy resin composites filled with pristine and organomodified fly ash were prepared and examined. The fly ash used is CaO-rich due to the origin of lignite from the northern Greece area and the power plants in Kozani. As matrix, the epoxy system with curing agent triethylenetetramine was used. A combination of mechanical stirring and ultrasonication was used for highly dispersed fly ash composites. SEM, FTIR spectroscopy and XRD measurements were used to study dispersion homogeneity, structure, degree of aggregation/agglomeration and interface formation of the matrix with the fly ash particles. The properties E′, E″ and relaxations α-(T{sub g}) and β-(Τ{sub β}) of the composites were assessed by DMA. Also, DSC and TGA measurements were used to characterize the thermal properties. Interesting results concerning the effect of the surface organomodification of fly ash on the network formation and the thermomechanical properties of the composites were derived. XRD and FTIR measurements reveal that the functional groups present on the surface of fly ash particles play a dominated role to interface formation. DMA results show that the fly ash surface modification affects the thermodynamic properties of the composites. Additionally, there is evidence showing that the short-scale β-relaxation is also affected by the fly ash surface organomodification.

• OSTI ID: 22970571
• Journal Information: Journal of Materials Engineering and Performance, Journal Name: Journal of Materials Engineering and Performance Journal Issue: 8 Vol. 28; ISSN 1059-9495; ISSN JMEPEG
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
AMINES
EPOXIDES
FLY ASH
FOURIER TRANSFORM SPECTROMETERS
INFRARED SPECTRA
INTERFACES
MATRICES
MODIFICATIONS
SCANNING ELECTRON MICROSCOPY
THERMAL GRAVIMETRIC ANALYSIS
THERMODYNAMIC PROPERTIES
X-RAY DIFFRACTION