The PMMA seed of microsphere was prepared by dispersion polymerization, and monodisperse microspheres were prepared by two-stage swelling procedure.

• 采用二步溶胀法制备单分散PMMA微球,首先用分散聚合法制备出单分散的PMMA微球为种子,然后对种子进行溶胀并聚合。