Abstract
In this report, the micro structure of PI/ TiO2films with different components prepared by in-situ polymerization method is researched by XRD, TEM, synchrotron radiation SAXS. Its micro structure characteristics include nano-particles distribution, PI molecule chains spacing and interface layer thickness. The experimental result shows that after doping, particle radius is almost 10nm, and cluster of nano-particles became more serious with increase of components, however, the spacing of PI molecule chains decreases 5.238 Å-4.625 Å. The scattering curves occurs negative deflection in Debye theory, it shows that there are interface layers with thicknesses in the range 0.7nm-2.1nm between nano-particles and composite matrix. Through analyzing the three kinds of micro structure change, it shows that when the component is 15 wt.%, the micro-structure of composite film is the optimal.
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