Anovelmethodforpreparationofpolymer-basedmagneticmicrosphereswasproposedbyutilizingmeltreactiveblending,whichwasbasedonselectivelocationofFe_3O_4nanoparticlesinPA6domainsofpolystyrene(PS)/polyamide6(PA6)immiscibleblends.ThemorphologyofPA6/Fe_3O_4compositemagneticmicrosphereswasstudiedbyscanningelectronicmicroscopy(SEM).Thecompositemagneticmicrospheresweresphericalwithadiameterrangeof0.5-8μm;thediameterwassharplydecreasedwithaverynarrowdistributionbyaddingterminalmaleicanhydridefunctionalizedpolystyrenes(FPS)forreactiveblending.Transmissionelectronmicroscopy(TEM)andthermogravimetryanalysis(TGA)resultsshowedthatmostofFe_3O_4waslocatedinthePA6microspheres.MagnetizationdatarevealedthemagnetitecontentofPA6/Fe_3O_4microsphereswasabout32wt%andthesaturationmagnetizationcouldbeupto17.2Am~2/kg.
