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STUDY ON THE NEW-CLASS SOLUBLE PI/SIO_2 NANOCOMPOSITE

Shang Xiuyong (Engineering Research Center in Organic Synthesis, Chinese Academy of Sciences, Shanghai 200062)Zhu Zikang, Yin Jie (College of Chemistry and Chemical Engineering, Shanghai Jiaotong University 200240)  
A new class of soluble polyimide/silica nanocomposite was prepared by the sol-gel process starting form tetraethoxysilane (TEOS) in the solution of polyamic acid in N-methyl-2-pyrrolidone. The hybrid films or solutions were obtained by the hydrolysis - polvcon-densation of TEOS in the polyamic acid solution, followed by heating at 270℃. UV - vis, SEM, TGA were used to monitor the microstructure, solubility, thermal properties, mechanical properties, etc. of the PI/SiO2 nanocomposite.
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