Process for Preparing Monodisperse Polystyrene Beads by Precipitation Polymerization

摘要

A process for preparing monodisperse polystyrene beads is provided to perform smooth precipitation polymerization at a lower temperature compared with a conventional process, and to ensure uniform average particle diameter and stabilized spherical shape. A process for preparing cross-linked polystyrene beads comprises a step of mixing a styrene monomer, cross-linking agent and polymerization initiator in a reaction solvent and performing precipitation polymerization to prepare polystyrene beads. The polymerization initiator is a mixed initiator containing persulfate-based initiator and 2,2-azobis(2,4-dimethylvaleronitrile) initiator in a weight ratio of 1 : 5~11.