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中文摘要：
研究了改性纳米二氧化硅对聚酰亚胺薄膜性能的影响。采用DSC，TG和DMA对薄膜热性能进行分析。热分析的结果表明，纳米二氧化硅的含量对聚酰亚胺的玻璃化转变温度（Tg）和耐热性能基本没有影响。DMA的结果还表明，二氧化硅含量越高，薄膜的储存模量越高。TEM分析表明，在聚酰亚胺中存在较大二氧化硅聚集体。
英文摘要：
The heat and mechanical properties of polyimide hybrid films filled with SiO2 nano-particles as a function of silica content had been studied. Their structures and properties are characterized by TG, DSC, DMA and TEM. The results show these fihns had the same high thermal behavior as silica content increase. The DMA resuhs show that the storage modulus increases with the increasing of content of silica particles. The morphology of the films is also analyzed by using TEM.
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