含芴结构环氧树脂的合成与性能

合成了一种耐湿热性能优异的环氧树脂9,9-二 芴,通过对环氧化反应影响因素的讨论确定了最佳的环氧化反应条件,使产物环氧值达到了理论值的97 ％。确定了纯的9,9-二 芴环氧树脂的固化工艺,并对其树脂浇注料的力学性能进行了评测。为研究9,9-二 芴对其它环氧树脂体系湿热性能的影响,对9,9-二 芴/AG-80树脂体系的吸水率进行了测定,并比较了该体系吸水前后玻璃化转变温度和模量的变化,从而证明了9,9-二 芴对提高环氧树脂耐湿热性能的作用。

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 Tg 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.