基于二氧化钛的特性和4-乙烯基吡啶的功能,利用沉淀聚合法在甲醇中合成出二乙烯基苯-苯乙烯-4-乙烯基吡啶共聚物包覆的二氧化钛多核的表面光滑的球形粒子.利用DSC和TG检测了聚合效果,通过傅里叶红外光谱证实了聚合物的结构单元,利用SEM观察了复合粒子的表面,获得了具有稳定性、表面光滑的球形微粒.相应的聚合机理通过分析一系列制备核壳微球方法所得产物的SEM照片和改变一些参数所得的结果得以证实.分散的顺序和4-乙烯基吡啶的用量决定了生成复合球形微粒的机理.进而,通过溴代烷烃和在甲醇中沉淀聚合产物表面的4-乙烯基吡啶化合而成的季铵盐证实了复合微粒的电泳特性.
Under specific property of titanium dioxide and 4-vinylpyridine, titanium dioxide multi-core and poly(divinyl-benzene-styrene-4-vinyl pyridine) shell hybrid composite spherical and smooth particles were prepared in methanol by precipitation polymerization. DSC and TG had detected polymerizing effect, structure unit of polymer was confirmed by FT-IR, and SEM took photographs of composite microsphere. As a result, the stable spherical and smooth particles were obtained. The corresponding mechanism was confirmed by SEM photographs and changing some parameters of core/shell microspheres prepared in a series of methods. The dispersing order and amount of 4-vinylpyridine dominated the mechanism of forming composite spherical particle. Then, the electrophoretic property of the composite particle was verified with a quaternary ammonium salt combined with hydrocarbon bromide and pyridyl covered on the surface of microsphere prepared in methanol by precipitation polymerization.
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