Reaction of Vinyl Functionalized Novel Polysiloxane-block-Polyimides with Silane Compounds and Properties of Corresponding Reaction Products

Abstract

A new class of vinyl-functionalized polysiloxane-block-polyimides was synthesized and characterized. The copolyimides were derived from 4, 4'-carbonyldiphthalic anhydride/bis [4- (3-aminophenoxy) phenyl] sulfone combined with two kinds of vinyl-containing diamino (poly) siloxanes and imidized by solution method. They were highly soluble in various organic solvents. The vinyl groups of the copolyimides were reacted with various hydrosiloxane compounds for crosslinking. The crosslinked products became insoluble in polar solvents and were analyzed and characterized by TMA, DMA, and ¹³C- and ²⁹Si-NMR. On the other hand, silicate-containing copolyimides could easily be derived by hydrosilylation of the copolyimides having vinyl groups and diethoxymethylsilane. The copolyimides containing silicate finally obtained were soluble in various organic solvents and easily hydrolyzed to give crosslinked copolyimides during the solution casting to prepare their films. The resulting materials have various potential applications as the new organic-inorganic materials.