Effect of sonication applied during production of carbon fiber/epoxy resin composites evaluated by differential scanning calorimetry and thermo-gravimetric analysis

Bogoeva-Gaceva, Gordana and Dimeski, Dimko and Herakovic, Niko (2011) Effect of sonication applied during production of carbon fiber/epoxy resin composites evaluated by differential scanning calorimetry and thermo-gravimetric analysis. Macedonian Journal of Chemistry and Chemical Engineering, Vol. 30, No. 2, pp. 189–195 (2011).

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Abstract

The influence of ultrasonic treatment, applied during the impregnation of carbon fiber bundle by
epoxy resin system, on thermal behavior of carbon fiber/epoxy resin composites in the course of crosslinknetwork
formation has been analyzed by differential scanning calorimetry (DSC). It was previously
shown [1] that this treatment has resulted in drastically increased interlaminar shear strength (ILSS) of
the bulk composites, produced by hot pressing. The enhanced ILSS was attributed to the formation of
more homogeneous and dense network, as revealed by epoxy consumption rate and increased Tg. In this
paper, DSC analysis is applied to further investigate peculiarities of carbon fiber/epoxy systems, exposed to
ultrasonic treatment, during isothermal and non-isothermal curing and post-curing. The acceleration of the
curing reaction as a consequence of sonication effects was found for all fiber/polymer systems, regardless
the surface chemistry of the fibers. The stronger interfacial bond in epoxy sized carbon fiber composites,
favored by ultrasound treatment, has also generated differences in thermal behavior of the composites
during their degradation followed by TGA/DTG.
Key words: carbon fibers; epoxy composites; ultrasound treatment; DSC, thermal degradation

Item Type:	Article
Subjects:	Engineering and Technology > Materials engineering
Divisions:	Faculty of Technology
Depositing User:	Dimko Dimeski
Date Deposited:	21 Nov 2012 19:02
Last Modified:	22 Nov 2012 09:09
URI:	https://eprints.ugd.edu.mk/id/eprint/1591

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