Dispersion copolymerization of styrene and N-vinyl carbazole in polar solvents

Copolymer microspheres consisting of styrene and N-vinyl carbazole (NVC) ha ve been prepared by dispersion polymerization. The effects of various polym erization parameters on the particle size were systematically studied. The particle size increased with the decrease of the system's initial solubilit y parameter and stabilizer concentration. When a small amount of inhibitor was added into the system, the particle size notably increased and the part icle size distribution widened. The ratio of styrene to NVC in the monomer mixture had no obvious effect on particle size. The amount of NVC in the co polymers increases with the increase of NVC in the monomers.