For TBA-Na pre-heat/cool and 2NapFF-TBA post-heat/cool, the process of thinning followed that as previously reported for elastic fluids (polyacrylamide and poly(ethylene oxide) ). The initial droplet contact and thinning processes are dominated by numerous factors such as surface tension, viscosity and inertial forces. At later stages, a slender filament (where height is 10x width) forms and subsequently thins and breaks. This process is termed the elastocapillary regime and has been described by an equation by Entov and Hinch 10 (equation 1).