SYNTHESIS AND PROPERTIES OF 9,9-BIS FLUORENE

A kind of highly moisture-resistant epoxy resin, 9,9-bis fluorene (Ⅱ), was synthesized. The optimal epoxidizing condition was obtained by studying the influence of different factors in the reaction, such as the amount of the reactants and their concentration, the amount of the catalyzer, the reaction temperature and time. As a result the epoxy value of the products reached 97% of the calculated value. The mechanical properties of the cured pure Ⅱ resin were studied. The water-absorbance, the glass transfer temperature and the module of the pure Ⅱ and the Ⅱ/AG-80 mixtures before and after absorbing water were investigated. The results indicate that the water-absorbance of the resin mixturesis reduced by the addition of Ⅱ, and T_g and E^' remain comparatively high after absorbing water compared with the pure AG-80. The addition of Ⅱ could improve the hot-wet property of AG-80.