A Mirmohseni - Polymer Research Technology Laboratory, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 29 Bahman Blvd., Tabriz, Iran.
G Samandari - Polymer Research Technology Laboratory, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 29 Bahman Blvd., Tabriz, Iran.

Epoxy resins are some of the most important thermosettings, and are widely used as coatings, electronic materials, adhesives, and in structural applications [1,2].The effective enhanced physicalproperties such as thermal properties (e.g., thermal stability, flame retardant, thermal conductivity ), mechanical properties(e.g.,mechanical strength , hardness , abrasion resistance ), electro-rheological properties , permeability properties(e.g., gasbarrier , pervaporation) and corrosion protection properties of polymers[3].An alternative approach for toughening is to fillepoxy cured polymers with inorganic nano-fillers to achievenanocomposites. Nano-clay, a layered silicate, is widely used for enhancement of epoxy properties [4]. In addition to layered nanofillers,various particulate ones such as: silica (SiO2) [5], alumina (Al2O3) [6], titania (TiO2) [7] and calcium carbonate (CaCO3)[8] are also employed for this purpose. Tensile strenght and impact strenght improvement were investigated and discussed in this paper