The polyaddition of fluorine-containing bis(epoxide)s and fluorine-containing triazine di(aryl ether)s were examined to give the corresponding fluorine-containing poly(cyanurate)s. It was observed that the synthesized fluoropolymers had good thermal stabilities and good film-forming properties. The glass transition temperatures (T-g's) and refractive-indices (n(D)'S) of synthesized polymers were determined by differential scanning calorimetry and ellipsometry, respectively, and it was found that the values of Tg's and nD'S were supported by their fluorine containing ratios and skeletons. (c) 2007 Wiley Periodicals, Inc.