Authors : B. Sakri , B. Legseir , T. Avramoglou and D. Letourneur
Abstract: Graft polymerization of Polymethyl Methacrylate (PMMA) on polysaccharide in presence of ceric ammonium nitrate, used as initiator, has been conducted to obtain hydro gel under best conditions (Fucan N1) = 0.5g ; (CAN) = 3.6.10-3 Mol L 1; (HNO3) = 0.2 M, temperature = 40�C, reaction time = 40 min, initiator/ Monomer rate = 1/10. In addition to a PH analysis of reaction media, an Infrared spectroscopy (IR) has been carried out to establish the appropriate synthesis conditions. This analysis has revealed a characteristic peak of the carbonyl group situated at 1733 cm 1 for the obtained copolymer Fucan-PMMA, with respect to the individual spectra of PMMA and Fucan N1. Furthermore, a viscosity analysis has been conducted on two fractions of raw solutions of Fucan in aqueous medium (H2O) and on the obtained copolymer as well. The outcome of this research has given us an insight to a suggestion of appropriate reaction mechanism in which the rate of polymerization (RP) is first order dependant on the monomer concentration and on the square-root of the CAN and initiator concentrations.
B. Sakri , B. Legseir , T. Avramoglou and D. Letourneur , 2007. Preparation of Hydrogel by Copolymerization of PMMA with a Polysaccharide (Fucan N1) in Presence of a Ceric Initiator in Acidic Environment . Journal of Engineering and Applied Sciences, 2: 1283-1289.