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通过双酚芴与二氯硅烷交替共聚,以环氧基团封端,制备含芴有机硅环氧树脂(EGF),并研究不同原料配比、催化剂浓度及反应时间等条件对环氧值的影响.采用红外、核磁、凝胶色谱、差示扫描量热、热重及盐酸-丙酮滴定等方法进行结构表征和性能测试.结果表明,当双酚芴与环氧氯丙烷的摩尔比为2∶10,NaOH质量分数为50%,开闭环反应时间为4h时,合成工艺最佳.按此工艺合成EGF,其数均、重均相对分子质量分别为2237和2760,多分散系数为1.23;EGF熔点为186.6℃;其初始分解温度为363.8℃,比双酚A环氧E-51高90.3℃,比双酚芴环氧(DGEBF)高45.4℃,较两者表现出更为优异的耐热性能;EGF较E-51具有更好的耐吸湿性能.

参考文献

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