Abstract
The effect of SiO2 nano-particles was investigated on the thermal property of epoxy composites including SiO2, by examining the effect of OH groups, the amount of which was noticed. Results were as follows : high Tg and high elastic modulus appeared by adding the nano-particles of SiO2. As compared with epoxy composites used SiO2 without free-type OH, Tg of that with free-type OH increased by 5°C, and elastic modulus improved by 2.5 times at elevated temperatures above Tg. Therefore, the improvement on the thermal resistance of epoxy composites is possible by controlling the amount of OH groups.
