Preparation of Monodisperse Polymer Particles by Photopolymerization

✍ Scribed by Cemal Esen; Gustav Schweiger

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 201 KB
• Volume: 179
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1996.0214

✦ Synopsis

Colvin et al. synthesed monomer droplets and froze these Highly monodisperse polymer particles with diameters of 5 to in liquid nitrogen. The vitrified monomer droplets were then 50 mm were prepared by photopolymerization of aerosol droplets, irradiated with ionizing radiation (Co 60 gamma source) and consisting of multiacrylate monomers, with UV-light radiation as the droplets thawed they slowly polymerized resulting in (wavelength É 360 nm). The monomer droplets were generated by large uniform polymer spheres in the 100-300 mm size range a vibrating-orifice droplet generator. The properties of the resulting with a CV of 1.57% for particles of 155 mm in diameter (7). particles (shape, size, size distribution, and surface characteristics) Photoinitiated polymerization of single electrodynamiwere measured by scanning electron microscopy and optical microscally levitated monomer droplets were investigated by Ward copy. The resulting particles were highly monodisperse with a coefet al. (8). The polymerization reactions were followed by ficient of variation (ratio of the standard deviation of the particles to the mean particle diameter) of 1% or less. All particles were fluorescence spectroscopy. Experiments on single particles spherical with smooth surfaces.