γ-Radiation synthesis of silver–polystyrene and cadmium sulfide–polystyrene nanocomposite microspheres

Formation of monodisperse polyacrylamide particles by radiation-induced dispersion polymerization: particle size and size distribution.

Polystyrene/melamine-formaldehyde hollow microsphere composite by self-assembling of latex particles at emulsion droplet interface

Preparation of monodisperse poly(methyl methacrylate) particles by radiation-induced dispersion polymerization using vinyl terminus polysiloxane macromonomer as a polymerizable stabilizer

Submicron-scaled cagelike polymer microspheres with hollow core/porous shell were synthesized by self-assembling of sulfonated polystyrene (PS) latex particles at monomer droplets interface. The swelling of the PS latex particles by the oil phase provided a driving force to develop the hollow core. The latex particles also served as porogen that would disengage automatically during polymerization. Influential factors that control the morphology of the microspheres, including the reserving time of emulsions, polymerization rate, and the Hildebrand solubility parameter and polarity of the oil phase, were studied. A variety of monomers were polymerized into microspheres with hollow core/porous shell structure and microspheres with different diameters and pore sizes were obtained. The polymer microspheres were characterized by scanning electron microscopy, transmission electron microscopy, optical microscopy, and Fourier transform infrared spectroscopy. © 2007 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 45: 933–941, 2007

Cagelike polymer microspheres with hollow core/porous shell structures

Monodisperse microspheres of polystyrene with diameters in the size range I -2.2(μm) were prepared by the radiation-induced dispersion polymerization. The polystyrene microspheres by radiation-induced in the presence of co- solvent (DMSO-H2) was investigated as functions of various factors such as irradiation time, irradiation dose rate, the amount of water and on or not stirring et al. The number of the nuclei produced in the early stage of the polymerization was found to be constant during the remainder of the polymerization. The nuclei grow to be monodisperse polymer particles without aggregation under appropriate conditions, This is attributed to the low mobility of the growing polymer particles.

Manwei Zhang

Papers

Preparation of monodisperse polystyrene particles by radiation-induced dispersion polymerization