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Synthesis, Characterization and Thermal Properties of SiO2/Pi Composite Film

SiO2/PI composite films with different percentage of incorporated nanoSiO2 were synthesized. With the increase of the adding SiO2 content, the surface roughness and the fractal dimension increased by SEM characterization for the fracture surface, and the thermal property of SiO2/PI composite films improved. The results indicate that the degree of imidization of the polyimide was full, and the polymer structure transformed from disorder into order after SiO2 was added to the PI matrix.