Síntese e caracteriza？？o de copolímeros à base de metacrilato de metila e divinilbenzeno com propriedades magnéticas

in this work, copolymers based on methyl methacrylate and divinylbenzene containing iron with magnetic properties were produced using the suspension polymerization method. an investigation was performed of the effect from the concentration of iron added to the polymerization, the mma/dvb molar ratio in the copolymer formation, type of suspension agent and stirring speed on the synthesis of the copolymers. the copolymers morphology, thermal stability, contents of embedded iron, particle size distribution, magnetic properties, surface area, volume and pore size were evaluated. polymeric microspheres with magnetic properties were successfully obtained. these materials showed good control of the spherical shape and agglomeration of iron particles under the surface of the microsphere. the analysis of magnetic properties pointed to materials with no hysteresis loops, thus being close to a material with superparamagnetic properties with saturation magnetization between 8.0 and 13.0 emu.g-1.