Preparation and characterization of polyaminophenylsilsesquioxane particles by two-step acid-base-catalyzed sol-gel process

Spherical polyaminophenylsilsesquioxane (H2NC6H4SiO3/2) particles were prepared by a two-step acid-base-catalyzed sol-gel process, and we found that the particles showed the glass transition behavior. Amino groups in the H2NC6H4SiO3/2 particles were partially changed to amido ones by acetylation using acetic anhydride.