Fe3O4/P(St-AA) core-shell composite microspheres,having 1～23μm diameter,0～0.1 mmol/g surface carboxyl groups and 0.5～9.0 mg/g magnetite,were prepared by dispersion polymerization of styrene-acrylic acid,with magnetic colloidal particles dispersing in ethanol/water or tetrahydrofuran/water.The size and magnetic response of composite microspheres are highly dependent on the amount of magnetic colloidal particles,solubility parameters of solvents,amount of monomer and initiator.
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Qiu et al. (1996) studied this question.
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