Figure 3 | Scientific Reports

Figure 3

From: Multimaterial 4D Printing with Tailorable Shape Memory Polymers

Figure 3

SM behavior of the (meth)acrylate based copolymer SMP network.

(a) The SM behavior has been investigated by following a typical SM cycle: at Step I, a sample is deformed by emax at a programming temperature TD; at Step II, the temperature is decreased from TD to TL while keeping the sample deformed by emax; at Step III, after unloading, there is a deformation bounce back Δe; at Step IV, the free recovery is performed by heating the sample to a recovery temperature TR. (b) The representative SMP strain-time curves achieved by stretching a SMP sample (80% BMA and 20% P750) at 63 °C, unloading at 25 °C and heating to 63 °C, 50 °C, 40 °C and 35 °C, respectively. (c) Shape fixity as a function of programming temperature. (d) Shape recovery time (t0.95) as a function of recovery temperature.

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