the role of nanoparticle composition as biodegradable carriers for variously therapeutical drugs is disclosed . nanoparticles are synthesized by anion emulsion polymerization of two alkyl - cyanoacrylate monomers with adjusted content ratio . by modulating the compositions , particle size , hydrophobicity and degradation rate of the copolymers is controlled . hence , to encapsulate wide range of therapeutical drugs , poly nanoparticles with feasible compositions are applied individually . the copolymer nanoparticles produced by n - butyl cyanoactylate and 2 - octyl cyanoacrylate , for example , were used therein . the nanoparticles composed of poly - co -] and poly might be adequate for therapeutical administration .