Rapid viscoelastic spreading

The addition of polymers is known to fundamentally affect capillary singularities such as drop pinch-off. In this study, we wonder how polymeric drops spread onto a solid. Although the dynamics liquid bridge connecting solid similar that pure water, find interface gets significantly sharper, which quantified by measuring curvature bridge. These findings are reminiscent what found for coalescence, even though spreading-coalescence analogy breaks down with viscoelastic liquids.