Synthesis of water-soluble oligomers from imidazole, ethyleneglycol diglycidyl ether and methacrylic acid. An insight into the chemical structure, aggregation behavior and formation of hollow spheres

LOMBARDO LUPANO LUCÍA; JUAN MANUEL LÁZARO MARTÍNEZ; VIZIOLI NORA; TORRES DIMAS; VIVIANA CAMPO DALL´ORTO

MACROMOLECULAR MATERIALS AND ENGINEERING (PRINT)

WILEY-V C H VERLAG GMBH

Lugar: Weinheim; Año: 2015 vol. 301 p. 167 - 181

1438-7492

The synthesis of non-soluble polyampholytes was modified to obtain water-soluble oligomers, by a sequential reaction at 60 8C of imidazole (IM), ethyleneglycol diglycidyl ether (EGDE) and methacrylic acid (MAA). The hydrogel Poly(EGDE-IM) with disubstituted imidazole (IMþ) residues, enhanced its solubility in water by functionalization with Poly(MAA). NMR and mass spectrometry evidenced ester groups, Poly(MAA) chains, Poly(EGDE), and IMþ links. Capillary electrophoresis evidenced populations with positive net charge at pH lower than 9, due to IMþ and protonatable residues (IMHþ). Water-soluble aggregates of oligomers were detected by size exclusion chromatography. The product aggregated with cations such as Fe(II) adsorbing anionic compounds, andformed hollow spheres when citric acid was present.