Synthesis and characterization of novel polyampholyte and polyelectrolyte polymers containing imidazole, triazole or pyrazole

J.M. LÁZARO MARTÍNEZ; A.K. CHATTAH; R.M. TORRES SÁNCHEZ; G.Y. BULDAIN; V. CAMPODALL'ORTO

ELSEVIER SCI LTD

Año: 2012 vol. 53 p. 1288 - 1288

ovel soluble and non-soluble polymers based on methacrylic acid, ethylene glycol diglycidyl ether and pyrazole, triazole or imidazole were obtained by a one-spot synthetic strategy. The new materials were characterized by spectroscopic techniques (FT-IR, and solution- and solid-state NMR). Evidence on the covalent binding of the different heterocycles to the non-soluble matrix was given by the unequivocal assignment of the 13C solid-state NMR spectra. Proton relaxation times in the rotating frame and twodimensional wideline separation (1H-13C WISE) NMR spectra were used to assess their molecular dynamics. The higher synthetic yield of polyampholytes bearing triazole or pyrazole correlated with a lower molecular motion and a higher cross-linking degree. The polyelectrolyte effect of these materials was exhaustively explored through the acid-base properties, swelling and zeta potential. The quaternization of heterocyclic residues, responsible for adsorptive properties, was studied tak