PREPARATION OF COMPOSITE MAGNETIC MICROSPHERES BY REACTIVE BLENDING

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摘要 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.
机构地区 不详
出版日期 2011年05月15日(中国期刊网平台首次上网日期,不代表论文的发表时间)
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