Abstract: Boron nitride (BN)/cyanate ester resin/glass fiber composites were prepared in order to enhance the properties. The effects of BN particles on the reaction activity of cyanate ester resin, mechanical properties, and heat resistance of the composites were investigated. It was found that BN particle had little influence on reaction activity of cyanate ester resin. Inclusion of 8 % couple agent treated BN particles resulted in 5 % and 36 % increase in the flexural strength and interlaminar shear strength, respectively. The addition of BN particles to the composites also increased the initial decomposition temperatures, heat resistance index, and thermal stability of cyanate ester resin composites.

Key words: Boron nitride, Cyanate ester, Epoxy resin, Composite