磁场引发苯乙烯分散聚合反应的研究

Study on dispersion polymerization of styrene initiated by magnetic field effect

本文采用苯乙烯的分散聚合反应体系为研究对象,在无外加温度、压力及其它物理手段的前提下,直接利用磁场在室温条件下引发苯乙烯的分散聚合反应,成功制备出了聚苯乙烯微球。研究结果表明,交变磁场作用引发苯乙烯分散聚合生成了聚苯乙烯,其重均分子量Mw=96856,数均分子量Mn=13162。所制备的聚苯乙烯微球的粒径为1～2μm,恒定磁场条件下制备的聚苯乙烯微球重含有部分不成形的杂质,而交变磁场条件下制备的聚苯乙烯微球的球形度规整,表面光滑,无缺陷和杂质。

In this paper, without any additional temperature, pressure and other physical energies, the dispersion polymerization of styrene was directly initiated by magnetic field effect at room temperature. The results showed that the polystyrene microspheres （Mw=96856, Mn=13162） prepared through dispersion polymerization of styrene initiated by alternative magnetic field effect had diameters between 1 and 21μm. The polystyrene microspheres prepared in constant magnetic field had some deformed impurities; the polystyrene microspheres prepared in alternative magnetic field had good sphericity and smooth surface, and had no defects and impurities.