Preparation of micron‐size monodisperse poly(methyl methacrylate) particles using poly(2‐oxazoline) macromonomer

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Abstract
Micron‐size monodisperse poly(methyl methacrylate) particles were prepared by dispersion copolymerization of methyl methacrylate with a hydrophilic poly(2‐oxazoline) macromonomer in an aqueous methanol solution. The macromonomer acted as a comonomer as well as a stabilizer. As the macromonomer concentration increased, the diameter of the particles decreased. The macromonomer with higher molecular weight, or with more hydrophilic nature, stabilized the particles more effectively The diameter of the particles was dependent on the initiator concentration. Under the conditions giving monodisperse particles, the particle volume increased linearly with the yield of the particles and the particle number was almost constant during the copolymerization. From ESCA analysis of the particle surface, poly(2‐oxazoline) chains were enriched on the surface.