Chemical release control: Schiff bases of vinylbenzaldehyde and functional amines

Abstract Schiff base (SB) monomers of vinylbenzaldehyde with functional amines were prepared. Copolymers of SB monomers with N‐vinyl‐2‐pyrrolidone soluble in aqueous solutions were obtained in most cases. However, p‐aminobenzenesulfonamide monomer resulted in gel formation. Thus, the reaction of vinylbenzaldehyde copolymer with the sulfonamide was used instead of the copolymerization. The hydrolytic behaviors of SB monomers and copolymers to liberate respective amines were structure dependent and, for most copolymers, the rates were lower than those of the corresponding monomers.