湿热老化对氰酸酯树脂/酚醛环氧树脂共混物结构与性能的影响  

EFFECTS OF HYDROTHERMAL AGEING ON STRUCTURES AND PROPERTIES OF CYANATE/EPOXY NOVOLAC BLENDS

作　　者：郭宝春[1] 傅伟文[1] 贾德民[1] 汪磊[1] 邱清华[1] 

机构地区：[1]华南理工大学材料科学与工程学院,广州510640

出　　处：《复合材料学报》2002年第3期6-9,共4页Acta Materiae Compositae Sinica

基　　金：广东省自然科学基金项目 (0 0 0 5 11)

摘　　要：制备了不同摩尔比的双酚 A二氰酸酯 /酚醛环氧树脂共混物 ,测定了共混物和纯氰酸酯聚合物的吸湿曲线 ,用 DMA和 FTIR研究了湿热老化前后共混物结构与性能的变化。结果表明 ,氰酸酯基摩尔分数大于 0 .5的共混物具有明显比聚氰脲酸酯更低的平衡吸湿。老化后共混物的玻璃化转变温度保持率随氰酸酯含量的增加而降低。老化后聚氰脲酸酯的 FTIR谱出现了降解产物的吸收峰 。Uncatalyzed blends of bisphenol A dicyanate ester/epoxy novolac with different molar ratios were prepared. Hydrothermal ageing for times up to one month was performed, and the water take-up profiles of those blends were determined by the gravimetric method. It was found that the blends absorbed much less water than homopolycyanate when the molar fraction of the cyanate group in the blends was greater than 0.5. Dynamic mechanical analysis and FTIR determination were performed on virgin samples and aged samples. The results demonstrate that the hydrothermal ageing resistance of the blends is superior to that of homopolycyanate.

关 键 词：氰酸酯树脂 酚醛环氧树脂 共混物 结构 性能 双酚A 二氰酸酯 湿热老化 吸湿性能 复合材料 

分 类 号：TQ323[化学工程—合成树脂塑料工业] TB332[一般工业技术—材料科学与工程]