Physico-Chemical nanomaterials science

Тermal destruction of epoxy composites with silica nanoparticles of different modification at fillers
Starokadomsky D.L1, E.Voronin1, Moshkovska N1, Kokhtych L.M.2,3
1 Composite Materials Department, Chuiko Institute of Surface Chemistry of the NAS of Ukraine. General Naumov Street, 17, Kyiv-03164, Ukraine. 

2 Coherent and Quantum Optics Department, Institute of Physics of the NAS of Ukraine. Prospect Nauki, 46, Kyiv-03039, Ukraine. 

3 National Technical University of Ukraine “Kyiv Polytechnic Institute”.  Prospect Peremogy, 37, Kyiv-03506, Ukraine.
E-mail: kokhtych@gmail.com

Epoxy composites with A300 silica nanoparticles, densyl and nanosilica modified with silver compounds (DAg) at filler content of С≤30 wt.% were investigated by thermal analysis and atomic force microscopy. Results were obtained on the effect of these additives and their mixtures on the heat resistance and morphology of the composites.
It is established that incorporation of such filters does not affect the heat resistance of composites except, increases only slightly the intensity of the destruction of the pristine composite (Fig. 1 a). 

Fig. 1. DSC curves obtained for the pristine matrix and with fillers: densyl,  A300, DAg (a); ASM image structures the surface composite with densyl (b).

b

The results also show the limited effect of densyl with 1–5 wt.% on compressive strength and adhesion at separation. Atomic force microscopy studies have shown fillers uniform distribution over the surface composite (Fig. 1 b).