VE_3% MEPECO also shows a slight increase yet an apparent decrease in modulus. Interestingly, VE_1% MEPECO and VE_7% MEPECO developed a much lower strength and modulus, maybe because 1% is too low for the additive to fill in the microstructural defects between VE molecules and 7% is too high, which leads to agglomeration or clustering of the additives over the surface and between the VE molecular structure. Here, a possible reduction in the strong rigidity and internal friction of the VE network caused a much lower strength and modulus. Though at 5% MEPECO the flexural strength improved, the impact test results speak otherwise. Figure shows that all loading percentages induced a lower impact energy. Meaning, the VE ability to absorb energy reduces upon the introduction of the additive. Likewise, the microstructural change might also create a more rigid and less ductile environment, leading to lower impact energy. Another assumption is that the adhesion between VE and MEPECO molecules is not strong enough to resist the impact. We may also assume that the improved hydrophilicity of the blend can lead to the formation of weak interfaces, resulting in less energy absorption.