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The mechanism for the formation of uniform micron‐size polystyrene particles by anionic dispersion polymerization of styrene in hexane medium was investigated. Uniform particles in the range of 2.28–7.14 μm were obtained by varying the polymerization parameters such as the stabilizer, initiator, monomer multi‐addition, and temperature. Particles of larger size and narrow molecular weight distribution were formed by increasing the initiator concentration. The particle size also increased with decreasing stabilizer concentration and polymerization temperature. The formation of larger size particles at lower temperature, lower stabilizer, and higher initiator concentrations provides supporting evidence that particle nucleation in anionic dispersion polymerization is due to a polymer chain aggregation mechanism. © 1996 John Wiley & Sons, Inc.

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Adsorption kinetics of amphipathic diblock AB copolymers of polystyrene-block-polybutadiene from selective solvent onto planar silicon wafer and polystyrene surfaces have been studied by ellipsometry. A theoretical analysis of the adsorption kinetics was applied to investigate the adsorbed layer thickness, the total amount adsorbed at each concentration, and the area occupied by each copolymer chain. Some insight into the architecture of the buoy in the solution is presented. In these studies we found a strong dependence of adsorption rate on the chemical nature of the substrates and on the bulk concentration of the adsorbent. Further, the kinetics of adsorption at different concentrations and temperatures suggest that both single polymer molecules and micelles are responsible for adsorption.