Highly Shrinkable Objects as Obtained from 4D Printing

4D printing of shape memory polymers enables the production of thermoresponsive objects. In this contribution, a facile printing strategy is followed for an in‐house synthesized thermoplastic poly(ether urethane). Processing by means of fused filament fabrication, in which the difference between nozzle temperature and material‐specific glass transition temperature of the polymer is kept as low as possible, allows to obtain highly shrinkable...