Cross-linked polymer microspheres have potential applications in many fields. Compared with seed polymerization, two-part dispersion polymerization is a very attractive method for preparing micron-sized cross-linked microspheres. However, the current dispersion polymerization would be adversely affected by the addition of more than 1 wt% of cross-linker at a time and even agglutination occurred. In this study, a facile method for the preparation of highly cross-linked microspheres by two-step dispersion polymerization of a chain transfer agent has been developed. The relationship between cross-linker and transfer has been studied in detail, and microspheres can be simultaneously maintained by adding the cross-linker ethylene glycol dimethacrylate (EGDMA) at concentrations of up to 10%.

交联聚合物微球在许多领域都有潜在的应用。与种子聚合相比，两部分分散聚合是一种非常有吸引力的制备微米级交联微球的方法。然而，一次加入超过1重量％的交联剂会不利地影响当前的分散聚合，甚至发生凝集。在这项研究中，开发了一种通过链转移剂的两步分散聚合制备高度交联微球的简便方法。详细研究了交联剂与转移之间的关系，通过添加浓度高达10%的交联剂乙二醇二甲基丙烯酸酯（EGDMA），可以同时保持微球。