Influence of the morphology of poly (EGDMA-co-HEMA) on the chemical modifications and retention of O-phosphothreonine

CESAR G. GOMEZ; CECILIA I. ALVAREZ; MIRIAM C. STRUMIA

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2003 vol. 55 p. 23 - 23

he influence of the morphology of ethylene glycol dimethacrylate-hydroxyethyl methacrylate copolymer [poly(EGDMA-co-HEMA)] base support to obtain different Fe3+-containing sorbents and their properties in retention of O-phosphothreonine [Thre(P)] is examined in this paper. Three base supports poly(EGDMA-co-HEMA) (I?III) were obtained using different quantities of initiator in suspension polymerization reactions. These products were submitted to chemical modifications using 1,4-butanediol diglycidyl ether (BDGE) in activation reactions and different chelating agents (iminodiacetic acid, IDA; disodium ethylenediamine tetraacetate, EDTA; and hexamethylenediamine tetrapropanoic acid, HMDTP) in coupling reactions to attain Fe3+-containing sorbents. Properties such as specific surface area (Ss), specific pore volume (Vp), scanning electron microscopy (SEM), IR spectroscopy, quantity of functional groups (oxirane and carboxyl), amount of chelated metal ion, ligand occupation (L), s