Investigation on the Controllable Synthesis of Colorized and Magnetic Polystyrene Beads With Millimeter Size Suspension Polymerization.

A series of colorized and magnetic polystyrene/FeO (PS/FeO) composite beads with millimeter size are successfully synthesized by introducing hydrophobic FeO suspension polymerization of styrene for the first time. Effects of the hydrophobic FeO content, stirring speed, and surfactant dosage on the macromorphology and particle size of PS/FeO beads are systematically investigated to realize the controllable synthesis. Moreover, three kinds of hydrophobic pigments are also employed to synthesize colorized polystyrene, which demonstrates the versatility, simplicity, and wide applicability of the proposed method. Scanning electron microscopy (SEM) and element mapping (EM) images demonstrated that the hydrophobic FeO is well dispersed in the polystyrene matrix. Thermogravimetric analysis (TGA) shows that the resultant PS/FeO beads possess a better thermal stability than neat PS. PS/FeO beads have a promising application in the fields of colorized extruded PS board, colorized expanded PS foam particle, and board.