Abstract: The cyanate ester resin (CE)/nano-SiC composites were prepared by moulding method. Influences of nano-SiC and its surface treatment on the static mechanical properties of CE were characterized through impact and flexural strengths. The reinforcement mechanism was discussed. It indicated that nano-SiC efficiently improved the static mechanical properties of CE, and the surface treatment with KH-560 of nano-SiC further improved the impact and flexural strengths. When the content of nano-SiC was 1 %, the impact and flexural strengths of the composites containing untreated nano-SiC increased 73.66% and 20.85%, those containing KH-560 modified nano-SiC increased 86.26% and 29.56%, respectively, based on neat CE resin.

Key words: cyanate ester resin, nano-SiC, mechanical properties, modified mechanism