Herein we report the fabrication of cross-linked polystyrene particle with a variety of nonspherical morphologies such as red blood cell-like, cap-like, apple-like and so forth through two-stage dispersion polymerization in polar media. Furthermore, we examine the effect of different polymerization conditions including monomer and cross-linker concentration, and the type of initiator, monomer, stabilizer and cross-linker on the shape of the obtained particles. The acquired results reveal that the particles morphology can be altered from spherical to nonspherical with a decrease in the content of cross-linker and monomer, and using more reactive initiators and cross-linkers. Furthermore, particles shape can be changed through the addition of a different second-stage monomer type. Finally, the possible formation mechanism of the discussed nonspherical particles is illustrated.

本文中，我们报告了通过在极性介质中进行两步分散聚合，制备具有多种非球形形态的交联聚苯乙烯颗粒的方法，例如红细胞状，帽状，苹果状等。此外，我们研究了包括单体和交联剂浓度在内的不同聚合条件，以及引发剂，单体，稳定剂和交联剂的类型对所得颗粒形状的影响。获得的结果表明，随着交联剂和单体含量的减少，以及使用更多的反应性引发剂和交联剂，颗粒的形态可以从球形变为非球形。此外，可以通过添加不同的第二阶段单体类型来改变颗粒形状。最后，