Polymers of butyl acrylate-methyl methacrylate with different morphologies were synthesized by emulsion polymerization. Four types of polymers were obtained : copolymer, core-shell, three layer, and a core-shell with a copolymer layer of variable composition (gradient). The effect of the morphologies on the mechanical and theological properties of these polymers was studied. It was found that when the same overall composition was used the properties of the polymer can be varied from those of rigid plastic to those of an elastomeric material. It was also found that increasing the content of butyl acrylate (BA) improves the mechanical properties and the presence of a copolymer zone improves the impact resistance of the material.