Preparation of crosslinked polystyrenes with quaternary ammonium and their antibacterial behavior

A series of insoluble crosslinked polystyrenes with different quaternary ammonium groups were synthesized, and their antibacterial activities against Staphylococcus aureus (S. aureus) were investigated by a colony count method. It is found that the antibacterial efficiency of the ammonium group increases as the substitute alkyl length increases.