Highly crosslinked poly(2-hydroxyethylmethacrylate) (PHEMA) beads (~ 100pm-2 mm in diameter) were prepared by the suspension polymerization of HEMA monomer in an aqueous medium consisting only of magnesium oxide (MgO) as suspension stabilizer and salting-out agent. The procedure is so simple and the particles have excellent spherical geometry and very narrow size distribution compared to PHEMA beads prepared by other techniques. The effect of various factors such as MgO concentration, stirring speed and monomer phase/aqueous phase ratio on the particle geometry, size and size distribution was investigated. It was shown that the amount of MgO in the dispersion medium is the most important parameter which affects the particle size and size distribution
Посилання на статтю:
Production of highly crosslinked hydrophilic polymer beads: effect of polymerization conditions on particle size and size distribution / Menemse Kiremitqi and Hakan Cukurova // Polymer. – 1992. – Vol 33. – P. 3257-3261.