SÍNTESIS Y CARACTERIZACIÓN DE POLÍMEROS DENDRONIZADOS TIPO MONOLITHS A PARTIR DE ACRILAMIDA, ÁCIDO ACRÍLICO, N,N´-METILENBISACRILAMIDA Y UN MONÓMERO DENDRÍTICO BASADO EN AMINA DE BEHERA

SERGIO DAVID GARCÍA SCHEJTMAN; FLORENCIA RIVELLI TRIVERIO; MARISA MARTINELLI

Cordoba

Congreso; 16º Congreso Internacional de Metalurgia y Materiales SAM-CONAMET 2016; 2016

UNC, UTN, INTI, UCC, SAM y SOCHIM

Monolithic polymers are used as base-supports in different separation techniques, among them chromatographic processes are the most important and, to a greater extent, the separation of biomolecules by affinity chromatography. In addition, the multivalent interactions can be improved by the high density of functional groups of the dendritic structures. Different macroporous polymers networks were synthetized as monoliths, using conventional monomers such acrylamide (AAm), acrylic acid (AAc) and acrylamide dendron (ABA) as dendritic monomer and cross-linked with N,N-methylenbisacrylamide (BIS); thus, AAc-ABA-BIS and AAm-ABA-BIS systems with high yield were obtained. We prepared these polymers thought free radical solution polymerization, using dimethyl sulfoxide as solvent and a mixture of polyethylene glycol 6000 /C14H29OH as co-porogen. Infrared spectroscopy (FT-IR) and thermogravimetric analysis (TGA/DTA) wereperformed and incorporation of monomers to matrixes was confirmed. The presence of dendrons improved hydrophobic properties so the swelling in aqueous solutions was significantly lower (e.g. from 275% to 75%), even at low concentration of ABA. Scanning Electron Microscopy images showed an increase of pore size and different morphology (e.g. estimated pore size of AAm-BIS was 800 nm and then was turned to 1000-1700 nm in the case of AAm-ABA20%-BIS). Therefore, dendritic monomer modified both chemical and morphological properties due to their high density of functional groups. Studies of metal ions immobilization were carried out using M 2+ solution indicating that the presence of the dendritic structure increases the amount of metal ions retained in the dendronized polymers by multivalent effect.