elaboration of ammonio methacrylate copolymer based spongy cationic particles via double emulsion solvent evaporation process the aim of present work is to investigate systematic study of the preparation of biodegradable particles via double emulsion solvent evaporation technique the used formation is based on cationic ammonium methacrylate copolymer eudragit rs 100 without the use of any stabilizer the effect of process parameters like ultra turrax stirring speed and stirring time ultrasonication time polymer amount and volume of outer aqueous phases on the colloidal properties of particles was investigated all prepared dispersions were characterized in terms of size size distribution and electrokinetic properties and surface morphology was investigated