Twisting balloons, a common childhood memory, can turn them into different shapes, such as dogs, swords, flowers, crowns etc. To make a balloon toy, the most basic and useful tricks are twisting and bending. In this thesis, we focus on twisting and possible configurations for balloons with different radius and length. It turns out that they exhibit four distinct phases, i.e., straight, snapping, spiral and supercoiling. Phase diagram is determined by experiment and double-checked by Molecular Dynamics (MD) simulations. There exists hysteresis when twist is reversed. We provide theoretical models that can explain and predict the correct form of phase boundaries. Finally, comparisons are made between the snapping of balloons and the pinch-off phenomenon for liquid drops.
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