通过扫描电镜(SEM)和差示扫描量热法(DSC)对纳米石墨薄片修饰前后的微观结构和对双马来酰亚胺树脂固化性能影响进行分析,实验得出纳米石墨薄片的修饰有利于其在树脂中的分散性能,并且纳米石墨薄片具有50～100nm厚度,仍保持着网状多孔结构;另还发现纳米石墨薄片改变了双马来酰亚胺树脂的玻璃转化温度和固化性能,还发现纳米石墨薄片与修饰的纳米石墨薄片对树脂性能影响不同.
The microscopic structures of graphite nanosheets (Nano G) and modified Nano G, and their influences on the curing properties of BMI polymer have been characterized by means of scanning electron microscopy (SEM) and differential scanning calorimetry (DSC). The experiments demonstrated that the modification of Nano G contributes to the dispersion of Nano G in composites and that Nano G, which has a thickness ranging 50～100nm, retains net-shape and multi-pore structure. It is also found that Nano G have great influence on the glass transition temperature and the curing performance of Bismaleimide (BMI) polymer. The influence of Nano G on the performance of polymer is different from the influence of modified Nano G on the performance of polymer.
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