【摘要】 目的:采用种子聚合法将甲基丙烯酸缩水甘油酯(GMA)包覆在聚苯乙烯(PS)种子上,制备出纳米级、单分散的核-壳型PS/PGMA高分子微球。方法:考察了引发剂(过硫酸钾)、表面活性剂(十二烷基磺酸钠)、单体(GMA)的用量和PS种子微球粒径等条件对PS/PGMA纳米微球粒径的影响。采用透射电子显微镜(TEM)、红外光谱(IR)等手段对样品的结构及形貌进行了表征。结果:通过优化制备条件,可以实现对微球粒径的调控,IR测定显示制备的微球含有PGMA与PS的特征官能团,TEM可看出所制微球球形度较好,具有清晰的壳-核型结构。结论:该方法制得PS/PGMA微球表面富含环氧基,因此更易于表面改性,克服了单一PS微球不易改性的缺点。更多还原

【Abstract】 Objective: To fabricate monodisperse poly-glycidyl methacrylate(PGMA) coated polystyrene(PS)(PS/PGMA) core-shell polymer nanoparticles by seeded polymerization.Methods: The influences of concentrations of initiator(potassium persulfate),surfactant(sodium dodecyl sulfate) and monomer(GMA)’s concentration as well as PS seed’s diameter on the size and morphology of the PS/PGMA microspheres were investigated.Transmission electron microscopy(TEM) and infrared spectroscopy(IR) were used to characterize the prepared PS/PGMA microspheres.Results: The size of microspheres could be controlled by changing and optimizing the reaction conditions.IR showed that the GMA was really modified on the PS seeds.The prepared PS/PGMA was found by TEM with good spherical and apparent core-shell structure.Conclusion: The GMA-coated PS microspheres can promise convenient surface modification and overcome the disadvantage of difficult surface functionalization of common PS microspheres.更多还原