SYNTHESIS AND CHARACTERIZATION OF NEW POLY(BUTADIENE-CO-ACRYLIC ACID(G) ACRYLIC-ACID) AND POLY(BUTADIENE(G) ACRYLIC-ACID)

Synthetic crosslinked polymers from oligomers of butadiene-co-acrylic acid (Mw 5000) or oligomers of butadiene (Mw 6000) and acrylic acids w ere obtained after grafting reactions using varying reactant ratios. C haracterization of the new crosslinked polymers were carried out by us e of FTIR, H-NMR, and C-13-NMR in the solid state and also with the sw ollen products in D2O, DMF D7, or DMSO D6. Determinations of swelling in distilled water for the different synthesized hydrogels showed incr ease in the V/Vo ratios as the concentrations of anions (carboxylate) became higher. These values were sensitive to different pH values and changes in the concentrations of electrolytes. Different behavior was observed for the polymers obtained from mass and from synthesis in ben zene. SEM analysis of the surfaces of the polymers obtained in mass sh owed a fibrous structure (with lower contents of carboxylic groups, an d more swellable and with greater capacity to retain albumin). A porou s surface was observed for products obtained in benzene (with higher c ontent of carboxyl groups and capacity to retain cations such as coppe r and malachite green).