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.
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