Abstract:

The hydrolytic copolycondensation of phenyhriethoxysilane （PTES） and γ-aminopropyhriethoxysilane （APS） was carried out in such four reaction systems as the toluene/water/hydrochloric acid, the tetrahydrofuran/ water/hydrochloric acid, the ethanol/water/ammonia and the sodium dodecyl sulfate/water/tetramethylammonium hydroxide. Resinoid particles, copolymer particles with a diameter of 200 nm, spherical particles with an average size of 3 μm and emulsive copolymers polyaminopropyl/phenylsilsesquioxane （PAPQ） were then obtained via interfacial polymerization, solution polymerization, dispersion polymerization and emulsion polymerization, respectively. Moreover, the compositions and structures of the products were confirmed by means of element analysis, FTIR and NMR. The results indicate that, in opposition to the copolymers prepared with basic or acid-then-basic catalysts, the copolymer prepared with acid catalyst possesses low crosslinking degree and good solubility, and that the polarity of cosolvents greatly influences the formation of PAPQ and the suspension of copolymer particles.

Key words: phenyhriethoxysilane, γ-aminopropyltriethoxysilane, hydrolytic copolyeondensation, catalytic system, cosolvent