Indomethacin-polybutylcyanoacrylate nanoparticles(IMC-PBCA) have been prepared using emulsion polymerization with biodegradable polybutylcyanoacrylate as a carrier material.The preparation procedure was optimized by single factor tests and uniform design with a U5(53) table.Dynamic laser light scattering,transmission electron microscopy,UV spectroscopy and XRD were used to characterize the nanoparticles.The results indicated that the optimum condition for the preparation of IMC-PBCA nanoparticles were pH 1....