Polyimide - silica hybrid materials

Polyimide-silica hybrid films with covalently bound phases were prepared via a sol - gel process. The starting materials were p-aminophenyltrimethoxysilane terminated poly(amic acid)s of controlled molecular weight and tetramethoxysilane. The actual extent of the sol-gel process was monitored by thermogravimetric analysis. The dependence of the membrane properties on the silica content and/or concentration of bonds between phases was studied.Pč/!