Abstract
Abstract In the present paper, effect of alumina nanoparticles on rheological properties of epoxy-alumina suspension has been investigated. Rheo-kinetic evaluation of nanocomposite was also conducted to find out the effect on gelation and vitrification behaviour of the epoxy-alumina nanocomposite. Suspension of nano particles in epoxy resin was achieved with and without the use of solvent (acetone) named as well dispersed (ultrasonication was used for dispersion of nanoparticles) and poorly dispersed (manual mixing) samples respectively. The results indicated that viscosity of epoxy-alumina nanoparticle suspension decreased, compared to that of neat epoxy at all the shear rates and wt.% of nanoparticles. Viscosity of suspension showed shear thinning behavior for alumina nanoparticles. Storage and loss moduli of suspension showed solid like behavior for both the types of dispersion with the increase in frequency. The gel time increased with the increase in wt.% of nanocomposites. The gelation of neat epoxy took less time in comparison to alumina nanoparticle
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