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Synthesis and characterization of nanocomposite of polyimide–silica hybrid from nonaqueous sol–gel process

✍ Scribed by Ging-Ho Hsiue; Jem-Kun Chen; Ying-Ling Liu

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
433 KB
Volume
76
Category
Article
ISSN
0021-8995

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✦ Synopsis

Polyimide-silica (PI-SiO 2 ) hybrids with a nanostructure was obtained using the nonaqueous sol-gel process by polycondensation of phenyltriethoxysilane in a polyamic acid solution. Self-catalyzed hydrolysis of phenyl-substituted akoxysilane and modification on the polyimide structure are applied and result in highly compatible PI-SiO 2 hybrids. Transparent PI-SiO 2 with a high silica content of about 45% was thus obtained. The prepared PI-SiO 2 films were characterized by infrared spectrometry, 29 Si-NMR, thermogravimetric analysis, differential scanning calorimetry, and scanning electron microscopy. These characterizations showed the silica influence on the properties of the hybrid. The thermal expansion coefficient of the PI-SiO 2 and the temperature correlation were also established for probing the potential for application.

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