Functionalization and chelating properties of a porous polymer derived from vinylamine

✍ Scribed by Hamid Tbal; Michele Delporte; Joëlle Morcellet; Michel Morcellet

• Book ID: 103072446
• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 579 KB
• Volume: 28
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(92)90041-y

✦ Synopsis

A porous polymer containing vinylamine units was prepared by suspension copolymerization of N-vinyl t-butyl carbamate, styrene and ethylene glycol dimethacrylate in the presence of heptane, followed by hydrolysis of the carbamate functions to obtain amino groups. This crosslinked polymer had a specific surface area of 16 m2/g, a porous volume of 1.32cm3/g and contained 3.75 meq/g of amino functions. It was then subjected to a series of chemical reactions in order to introduce specific chelating ligands, viz. iminodiacetic, aminophosphonic, thiourea and dithiocarbamate. The distribution of the new functional groups inside the beads was studied by X-ray micro analysis for phosphorus, nitrogen and sulphur. The chelating properties of these new polymers toward copper and uranium were then determined by the batch method. Most of them possessed high capacities compared to commercial resins crosslinked with divinylbenzene. The distribution of uranium inside the beads was also studied.