| Hollow polymer microspheres have excellent deformation performances because of the special hollow structure. Nowadays, hollow polymer particles are widely used in coating, painting, paper making, leather treating, cosmetic, and so on. Such particles also have amazing potential applications as light weight agents, insulated agents, micro-capsule materials, etc.In this paper, emulsion polymerization was adopted to prepare hollow latex particles with moderate size and enough rigidity. Methyl methacrylate/butyl acrylate/methacrylic acid copolymer emulsions were first prepared as seed latexes and the seeded emulsion polymerizations of methyl methacrylate, methylacrylic acid (MAA) and divinyl benzene(DVB) were carried out to prepare hydrophilic carboxylated core latex particles consequently. The hydrophobic shell was then formed on the basis of the core by using styrene, acrylonitrile and divinyl benzene as comonomers. Finally, the hollow latex particles were obtained by alkalization treatment of the core-shell latex particles.The effects of stirring rate, reaction temperature, dosages and feeding methods of sodium dodecyl benzene sulfonate (SDBS), DVB content, ratio of the core monomers to shell ones, reaction time, temperature and initial pH for alkalizng on the stability of the emulsion system, as well as sizes, morphologies and volume expansions of hollow latex. particles were investigated. The morphologies and. particle sizes of hollow latex particles were characterized by TEM and SEM .And the optimal feeding method, recipe and alkalization treatment condition were determined.And the magnetic polymer microspheres prepared with the hollow microspheres by situ reaction.which have the good sphericity and strong magnetic responsivity,. magnetic material inside was Fe3O4.The magnetic content is up to 16.421% by the TG measure.
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