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Abstract

The mechanical behavior of epoxy matrix composites filled with nanosized silica particles and styrene-butadiene rubber is discussed. Scanning electron microscopy analysis and tensile test carried out at different crosshead speeds on the silica-styrene-butadiene rubber epoxy nanocomposites indicated the absence of particle aggregation and a reinforcing effect in terms of increased elastic modulus, yield, and ultimate strength. The results of wear test in pin-on-disc mode and hardness test on Rockwell R scale showed that the nanosized silica particles could improve the wear resistance of the epoxy matrix even though the content of the filler is at a relatively low level (1.0-2.0 wt%). This makes it possible to develop novel type of epoxy-based material with improved wear resistance for various applications. About 40-70% increase in impact strength has been noticed due to addition of 0.5-1.5 wt% of styrene-butadiene rubber in 1.0 wt% silica-filled epoxy composite. A good correlation between mechanical properties and weight contents of the filler materials, hardness and ultimate strength, and hardness and wear rate has been observed.

Keywords

silica particle styrene-butadiene rubber mechanical behavior impact behavior hardness testing.

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Silica-Styrene-Butadiene Rubber Filled Hybrid Composites: Experimental Characterization and Modeling

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