Nanotech 2010

Thermomechanical Properties of Epoxy Resin MWCNts Nanocomposites

A. Kanapitsas, H. Zois, C.G. Delides
Technological Educational Institute of Lamia Department of E, GR

Keywords: polymer nanocomosites, multi walled carbon nanotubes, thermogravimetry


The main aim of the present work is to study the mechanical and thermal properties of nanocomposite materials based on epoxy resin (ER) matrix reinforced with multi-walled carbon nanotubes (CNTs). The filler content was systematically varied from 0.1 to 1 % w/w. Thermogravimetric/Differential Thermal Analysis (TGA/DTA) and Dynamic Mechanical Analysis (DMA) measurements were carried out. Relative TGA and derivative (DTGA) curves for neat epoxy and the prepared ER/CNTs nanocomposites are presented. The results revealed that the samples show good thermal stability for temperatures up to 350 oC with a maximum decomposition temperature higher than 370 oC. The decomposition (thermal degradation) temperature corresponds to the temperature of the peak of the derivative mass loss (DTGA) curve, i.e. the temperature of the maximum weight loss rate. Pure epoxy matrix shows, generally, better thermal stability (i.e. the degradation starts at higher temperatures), compared to the ER/CNTs nanocomposites. The char formation mechanism is, generally, enhanced when adding filler particles, however the values of the residual mass for the ER/CNTs nanocomposites decrease with increasing filler content. For the samples with lower filler content, the glass transition temperature decreases.
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