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Synthesis and thermomechanical characterization of polyimides reinforced with the sol–gel derived nanoparticles

✍ Scribed by T.A. Shantalii; I.L. Karpova; K.S. Dragan; E.G. Privalko; V.P. Privalko

Publisher
Institute of Physics and National Institute of Materials Science
Year
2003
Tongue
English
Weight
247 KB
Volume
4
Category
Article
ISSN
1468-6996

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✦ Synopsis

Polyimide-based nanocomposites prepared by the in situ generation of inorganic nanoparticles (silica) through the sol-gel process were characterized by kinetics of water uptake, thermogravimetry and dynamic mechanical analysis.

Silica particles turned out to possess a rather loose inner structure characterized by enhanced water diffusivities and by dynamic elasticity moduli comparable to that of the pristine, glassy PI. Thermal stability and thermomechanical properties of nanocomposites in the glassy state remained nearly the same as those of the pristine PI, while a significant reinforcement effect was observed for the rubbery PI matrix.

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