The further development of poly(methylmethacrylate) reinforced with low molecular weight polybutadiene-based rubbers previously studied is described. The materials produced have been optimized with respect to impact strength and Young's modulus, giving results up to 0.13 J for the former whilst maintaining the latter at about 2.3 G.Pa. Additionally, the systems have been evaluated with respect to viscoelastic properties, water absorption and the effect of the latter on mechanical properties. Further work on the underlying mechanisms should lead to a greater understanding of these systems which could, in turn, produce more superior materials.